Fix cpp.type of protocol Value and Object
Fix cpp.type of protocol Value and Object

Summary: Fixed cpp.type of protocol Value and Object to use full namespace so that they can be used in thrift files outside of `apache::thrift::protocol::detail` namespace.

Reviewed By: thedavekwon

Differential Revision: D38841265

fbshipit-source-id: 55d2eae860ef18d9efc7007c7670bff7399964df

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift