Summary:
- Add a serialization test for forwards/backwards compatibility.
- Hook the Python tests up to "make check".
- Miscellaneous changes to the Python tests.
Reviewed By: mcslee
Test Plan: Ran the test.
git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665480 13f79535-47bb-0310-9956-ffa450edef68