Always register api.domain with the router

* api.domain will always reach the cloud controller.
* Any existing prefixes will also be registered so they will work too.
* Manifests that use ccng will continue to work with both ccng.domain and
api.domain with no changes.

lib/cloud_controller/legacy_api/legacy_service_lifecycle.rb

@@ -40,7 +40,7 @@ def read_serialized_url(gateway_name, snapshot_id)
 
     def get_upload_url(gateway_name)
       #TODO: switch upload url returns to point to sds
-      "#{@config[:external_domain]}/services/v1/configurations/#{gateway_name}/serialized/data"
+      "#{[*@config[:external_domain]].first}/services/v1/configurations/#{gateway_name}/serialized/data"
     end
 
     def import_from_url(gateway_name)

lib/cloud_controller/message_bus.rb

@@ -44,7 +44,7 @@ def register_routes
       router_register_message = Yajl::Encoder.encode({
         :host => @config[:bind_address],
         :port => config[:port],
-        :uris => [config[:external_domain]],
+        :uris => config[:external_domain],
         :tags => {:component => "CloudController" },
       })
 

spec/api/legacy_service_lifecycle_spec.rb

@@ -438,6 +438,13 @@ module VCAP::CloudController
         post "/services/v1/configurations/lifecycle/serialized/uploads", {}, headers_for(@user)
         last_response.status.should == 200
         last_response.body.should == "http://api.fake.com/services/v1/configurations/lifecycle/serialized/data"
+        end
+
+      it "should create a upload url" do
+        config_override(:external_domain => %w{http://api.fake.com http://api.fake2.com/})
+        post "/services/v1/configurations/lifecycle/serialized/uploads", {}, headers_for(@user)
+        last_response.status.should == 200
+        last_response.body.should == "http://api.fake.com/services/v1/configurations/lifecycle/serialized/data"
       end
     end