Merge pull request #3822 from rroa/bugfix/do_servers_filters

[DigitalOcean] Added filtering capabilities to servers request.

lib/fog/digitalocean/models/compute_v2/servers.rb

@@ -15,7 +15,7 @@ module Fog
         # @raise [Fog::Compute::DigitalOceanV2::ServiceError]
         # @see https://developers.digitalocean.com/documentation/v2/#droplets
         def all(filters = {})
-          data = service.list_servers.body['droplets']
+          data = service.list_servers(filters).body['droplets']
           load(data)
         end
 

lib/fog/digitalocean/requests/compute_v2/list_servers.rb

@@ -2,18 +2,18 @@ module Fog
   module Compute
     class DigitalOceanV2
       class Real
-        def list_servers
+        def list_servers(filters = {})
           request(
             :expects => [200],
             :method => 'GET',
-            :path => '/v2/droplets'
+            :path => "/v2/droplets?#{filters.to_a.map { |x| "#{x[0]}=#{x[1]}" }.join("&")}"
           )
         end
       end
 
       # noinspection RubyStringKeysInHashInspection
       class Mock
-        def list_servers
+        def list_servers(filters = {})
           response = Excon::Response.new
           response.status = 200
           response.body = {