Adds template retrieving into Plan

Adds following to Planning service of OpenStack:
 * get_plan_templates request
 * templates, master_template, environment and
   provider_resource_templates methods to Plan model
 * tests for get_plan_template request
 * tests for template retrieving methods of Plan model

lib/fog/openstack/models/planning/plan.rb

@@ -5,6 +5,9 @@ module Fog
     class Planning
       class Plan < Fog::Model
 
+        MASTER_TEMPLATE_NAME = 'plan.yaml'
+        ENVIRONMENT_NAME = 'environment.yaml'
+
         identity :uuid
 
         attribute :description
@@ -19,6 +22,24 @@ module Fog
           prepare_service_value(attributes)
           super
         end
+
+        def templates
+          service.get_plan_templates(uuid).body
+        end
+
+        def master_template
+          templates[MASTER_TEMPLATE_NAME]
+        end
+
+        def environment
+          templates[ENVIRONMENT_NAME]
+        end
+
+        def provider_resource_templates
+          templates.select do |key, template|
+            ![MASTER_TEMPLATE_NAME, ENVIRONMENT_NAME].include?(key)
+          end
+        end
       end
     end
   end

lib/fog/openstack/planning.rb

@@ -28,6 +28,7 @@ module Fog
 
       # Plan requests
       request :list_plans
+      request :get_plan_templates
       request :get_plan
 
       class Mock

lib/fog/openstack/requests/planning/get_plan_templates.rb

@@ -0,0 +1,28 @@
+module Fog
+  module Openstack
+    class Planning
+      class Real
+        def get_plan_templates(plan_uuid)
+          request(
+            :expects => [200, 204],
+            :method  => 'GET',
+            :path    => "plans/#{plan_uuid}/templates"
+          )
+        end
+      end # class Real
+
+      class Mock
+        def get_plan_templates(plan_uuid)
+          response = Excon::Response.new
+          response.status = [200, 204][rand(1)]
+          response.body = {
+            "environment.yaml" => "... content of template file ...",
+            "plan.yaml" => "... content of template file ...",
+            "provider-compute-1.yaml" => "... content of template file ..."
+          }
+          response
+        end # def get_plan_templates
+      end # class Mock
+    end # class Planning
+  end # module Openstack
+end # module Fog

tests/openstack/models/planning/plan_tests.rb

@@ -0,0 +1,21 @@
+Shindo.tests("Fog::Openstack[:planning] | plan", ['openstack']) do
+  @instance = Fog::Openstack[:planning].plans.first
+
+  tests('success') do
+    tests('#templates').succeeds do
+      @instance.templates
+    end
+
+    tests('#master_template').succeeds do
+      @instance.master_template
+    end
+
+    tests('#environment').succeeds do
+      @instance.environment
+    end
+
+    tests('#provider_resource_templates').succeeds do
+      @instance.provider_resource_templates
+    end
+  end
+end

tests/openstack/requests/planning/plan_tests.rb

@@ -12,6 +12,8 @@ Shindo.tests('Fog::Openstack[:planning] | Planning plan requests', ['openstack']
     "version" => Fog::Nullable::Integer,
   }
 
+  @plan_templates_format = Hash
+
   tests('success') do
     tests('#list_plans').data_matches_schema([@plan_format]) do
       plans = Fog::Openstack[:planning].list_plans.body
@@ -22,5 +24,9 @@ Shindo.tests('Fog::Openstack[:planning] | Planning plan requests', ['openstack']
     tests('#get_plan').data_matches_schema(@plan_format) do
       Fog::Openstack[:planning].get_plan(@instance['uuid']).body
     end
+
+    tests('#get_plan_templates').data_matches_schema(@plan_templates_format) do
+      Fog::Openstack[:planning].get_plan_templates(@instance['uuid']).body
+    end
   end
 end