THRIFT-862. java: Async client issues / improvements

This patch improves quite a large number of things about the async client code.

Patch: Ning Liang

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@1005221 13f79535-47bb-0310-9956-ffa450edef68
6 files changed