Connect to the service only when remote census endpoint is defined

Also return an invalid response when the endpoint is not defined.

This will allow to test remote web services on development environments.

lib/remote_census_api.rb

@@ -73,7 +73,7 @@ class RemoteCensusApi
   private
 
     def get_response_body(document_type, document_number, date_of_birth, postal_code)
-      if end_point_available?
+      if end_point_defined?
         request = request(document_type, document_number, date_of_birth, postal_code)
         client.call(Setting["remote_census.request.method_name"].to_sym, message: request).body
       else
@@ -118,8 +118,8 @@ class RemoteCensusApi
       to_set[final_key] = value
     end
 
-    def end_point_available?
-      !Rails.env.development?
+    def end_point_defined?
+      Setting["remote_census.general.endpoint"].present?
     end
 
     def stubbed_invalid_response