THRIFT-1006. java: Impossible to correctly qualify an enum constant in an external...

THRIFT-1006. java: Impossible to correctly qualify an enum constant in an external thrift file

Be a little more sensitive to how we parse out dots; some java generator changes to make sure things stay consistent.

THRIFT-1005. java: Give unions byte[] signature methods to go along with their ByteBuffer counterparts

Some new constructors, getters, and setters to ease migration of unions to ByteBuffer style.

git-svn-id: https://svn.apache.org/repos/asf/thrift/trunk@1038399 13f79535-47bb-0310-9956-ffa450edef68