clear dianping-master branch, and get ready to redownload from dianping github, so that local changes are discarded

Bugfix in TcpSocketSender.java

Revert "Re-use the direct buffer in TCPSocketSender, instead of allocating one buffer for each call to sendInternal()"

This reverts commit b7853ef1.

Re-use the direct buffer in TCPSocketSender, instead of allocating one buffer for each call to sendInternal()

refactor code

fix logMetricForSum format error