Clean up the unit tests.

- Make Python tests cwd-agnostic.
- Use boost::test.
- Add a benchmark.
- Use a library to clean up test/Makefile.am.


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665640 13f79535-47bb-0310-9956-ffa450edef68
11 files changed