Remove duplicate requires from services

Following work on reorganising the requires, there was an inconsistent
approach to where service wrappers are required. (Fog::Compute...)

Since they should be standardised and shared across providers (although
they really aren't yet) they have been moved to `fog-core` gem.

Each provider has their own `lib/fog/{provider}/core` files that is
required by each of their services. These files should all require
`fog/core` which already required most or these.

So this removes the extra cases to concentrate them in core.

lib/fog/atmos/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/atmos/core'
-require 'fog/storage'
 
 module Fog
   module Storage

lib/fog/aws/cdn.rb

@@ -1,5 +1,4 @@
 require 'fog/aws/core'
-require 'fog/cdn'
 
 module Fog
   module CDN

lib/fog/aws/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/aws/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/aws/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/aws/core'
-require 'fog/dns'
 
 module Fog
   module DNS

lib/fog/aws/signaturev4.rb

@@ -1,5 +1,6 @@
+require 'fog/aws/core'
+
 # See http://docs.amazonwebservices.com/general/latest/gr/signature-version-4.html
-#
 module Fog
   module AWS
     class SignatureV4

lib/fog/aws/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/aws/core'
-require 'fog/storage'
 
 module Fog
   module Storage

lib/fog/bare_metal_cloud/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/bare_metal_cloud/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/bluebox/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/bluebox/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/bluebox/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/bluebox/core'
-require 'fog/dns'
 
 module Fog
   module DNS

lib/fog/brightbox/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/brightbox/core'
-require 'fog/compute'
 require 'fog/brightbox/compute/shared'
 require 'fog/brightbox/compute/image_selector'
 

lib/fog/cloudsigma/compute.rb

@@ -1,6 +1,5 @@
 require 'fog/cloudsigma/core'
 require 'fog/cloudsigma/connection'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/cloudstack/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/cloudstack/core'
-require 'fog/compute'
 require 'digest/md5'
 
 module Fog

lib/fog/digitalocean/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/digitalocean/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/dnsimple/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/dnsimple/core'
-require 'fog/dns'
 
 module Fog
   module DNS

lib/fog/dnsmadeeasy/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/dnsmadeeasy/core'
-require 'fog/dns'
 
 module Fog
   module DNS

lib/fog/dreamhost/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/dreamhost/core'
-require 'fog/dns'
 
 module Fog
   module DNS

lib/fog/dynect/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/dynect/core'
-require 'fog/dns'
 
 module Fog
   module DNS

lib/fog/go_grid/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/go_grid/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/google/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/google/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/google/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/google/core'
-require 'fog/storage'
 
 module Fog
   module Storage

lib/fog/hp/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/hp/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/hp/compute_v2.rb

@@ -1,5 +1,4 @@
 require 'fog/hp/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/hp/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/hp/core'
-require 'fog/storage'
 
 module Fog
   module Storage

lib/fog/ibm/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/ibm/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/ibm/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/ibm/core'
-require 'fog/storage'
 
 module Fog
   module Storage

lib/fog/internet_archive/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/internet_archive/core'
-require 'fog/storage'
 
 module Fog
   module Storage

lib/fog/joyent/compute.rb

@@ -1,6 +1,5 @@
 require 'fog/joyent/core'
 require 'fog/joyent/errors'
-require 'fog/compute'
 require 'net/ssh'
 
 module Fog

lib/fog/joyent/errors.rb

@@ -1,4 +1,5 @@
 require 'fog/joyent/core'
+
 module Fog
   module Compute
     class Joyent < Fog::Service

lib/fog/libvirt/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/libvirt/core'
-require 'fog/compute'
 require 'fog/libvirt/models/compute/util/util'
 require 'fog/libvirt/models/compute/util/uri'
 

lib/fog/linode/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/linode/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/linode/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/linode/core'
-require 'fog/dns'
 
 module Fog
   module DNS

lib/fog/local/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/local/core'
-require 'fog/storage'
 
 module Fog
   module Storage

lib/fog/ninefold/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/ninefold/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/ninefold/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/ninefold'
-require 'fog/storage'
 require 'fog/atmos'
 
 module Fog

lib/fog/openstack/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/openstack/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/openstack/metering.rb

@@ -1,5 +1,4 @@
 require 'fog/openstack/core'
-require 'fog/metering'
 
 module Fog
   module Metering

lib/fog/openstack/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/openstack/core'
-require 'fog/storage'
 
 module Fog
   module Storage

lib/fog/openvz/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/openvz/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/rackspace/cdn.rb

@@ -1,5 +1,4 @@
 require 'fog/rackspace/core'
-require 'fog/cdn'
 
 module Fog
   module CDN

lib/fog/rackspace/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/rackspace/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/rackspace/compute_v2.rb

@@ -1,5 +1,4 @@
 require 'fog/rackspace/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/rackspace/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/rackspace/core'
-require 'fog/dns'
 
 module Fog
   module DNS

lib/fog/rackspace/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/rackspace/core'
-require 'fog/storage'
 
 module Fog
   module Storage

lib/fog/rage4/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/rage4/core'
-require 'fog/dns'
 
 module Fog
   module DNS

lib/fog/storm_on_demand/account.rb

@@ -1,6 +1,5 @@
 require 'fog/storm_on_demand/core'
 require 'fog/storm_on_demand/shared'
-require 'fog/account'
 
 module Fog
   module Account

lib/fog/storm_on_demand/billing.rb

@@ -1,5 +1,4 @@
 require 'fog/storm_on_demand/core'
-require 'fog/billing'
 require 'fog/storm_on_demand/shared'
 
 module Fog

lib/fog/storm_on_demand/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/storm_on_demand/core'
-require 'fog/compute'
 require 'fog/storm_on_demand/shared'
 
 module Fog

lib/fog/storm_on_demand/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/storm_on_demand/core'
-require 'fog/dns'
 require 'fog/storm_on_demand/shared'
 
 module Fog

lib/fog/storm_on_demand/monitoring.rb

@@ -1,5 +1,4 @@
 require 'fog/storm_on_demand/core'
-require 'fog/monitoring'
 require 'fog/storm_on_demand/shared'
 
 module Fog

lib/fog/storm_on_demand/network.rb

@@ -1,6 +1,5 @@
 require 'fog/storm_on_demand/core'
 require 'fog/storm_on_demand/shared'
-require 'fog/network'
 
 module Fog
   module Network

lib/fog/storm_on_demand/storage.rb

@@ -1,5 +1,4 @@
 require 'fog/storm_on_demand/core'
-require "fog/storage"
 require "fog/storm_on_demand/shared"
 
 module Fog

lib/fog/storm_on_demand/support.rb

@@ -1,5 +1,4 @@
 require 'fog/storm_on_demand/core'
-require 'fog/support'
 require 'fog/storm_on_demand/shared'
 
 module Fog

lib/fog/storm_on_demand/vpn.rb

@@ -1,6 +1,5 @@
 require 'fog/storm_on_demand/core'
 require 'fog/storm_on_demand/shared'
-require 'fog/vpn'
 
 module Fog
   module VPN

lib/fog/vcloud/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/vcloud/core'
-require 'fog/compute'
 
 module Fog
   module Vcloud

lib/fog/vcloud_director/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/vcloud_director/core'
-require 'fog/compute'
 
 class VcloudDirectorParser < Fog::Parsers::Base
   def extract_attributes(attributes_xml)

lib/fog/vmfusion/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/vmfusion/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/voxel/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/voxel/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/xenserver/compute.rb

@@ -1,5 +1,4 @@
 require 'fog/xenserver/core'
-require 'fog/compute'
 
 module Fog
   module Compute

lib/fog/zerigo/dns.rb

@@ -1,5 +1,4 @@
 require 'fog/zerigo/core'
-require 'fog/dns'
 
 module Fog
   module DNS