Add temporary_enable_v2 flag to cc-worker config

* required for cloudfoundry/cloud_controller_ng#4058

Author: jochenehret

jobs/cloud_controller_worker/spec

@@ -388,6 +388,10 @@ properties:
     default: false
     description: "Enable development features for monitoring and insight"
 
+  cc.temporary_enable_v2:
+    description: "Enable V2 endpoints"
+    default: true
+
   cc.newrelic.license_key:
     default: ~
     description: "The api key for NewRelic"

jobs/cloud_controller_worker/templates/cloud_controller_ng.yml.erb

@@ -128,6 +128,8 @@ db: &db
 
 <% system_domain = p("system_domain") %>
 
+temporary_enable_v2: <%= p("cc.temporary_enable_v2") %>
+
 uaa:
   internal_url: <%= "https://#{p("cc.uaa.internal_url")}:#{p("uaa.ssl.port")}" %>
   ca_file: /var/vcap/jobs/cloud_controller_worker/config/certs/uaa_ca.crt

spec/cloud_controller_worker/cloud_controller_worker_spec.rb

@@ -258,6 +258,24 @@ module Test
             end
           end
         end
+
+        describe 'enable v2 API' do
+          it 'is by default true' do
+            template_hash = YAML.safe_load(template.render(manifest_properties, consumes: links))
+            expect(template_hash['temporary_enable_v2']).to be(true)
+          end
+
+          context 'when explicitly disabled' do
+            before do
+              manifest_properties['cc']['temporary_enable_v2'] = false
+            end
+
+            it 'is false' do
+              template_hash = YAML.safe_load(template.render(manifest_properties, consumes: links))
+              expect(template_hash['temporary_enable_v2']).to be(false)
+            end
+          end
+        end
       end
     end
   end