* commit 'fea7c857':
  added group and modules key at application endpoint
  Move each viewset to separate file and added new field code for Application model
  Replaced None in message response result with []
  Modified status messages for no records
  Added status response in utils, CRUD for services and endpoint models
  Added APIServices CRUD
  Complete Application CRUD, Added service_token for APIServices
  Update model fields, pagination, serializer validations and viewset CRUDs