Add retry logic and cleanup for PipelinesBackend

Revision created by MOE tool push_codebase.
MOE_MIGRATION=7098


git-svn-id: https://appengine-pipeline.googlecode.com/svn/trunk@171 1742be92-6d41-bc97-00b7-290b722d530a
2 files changed
tree: eb9fc67ee29978c46e2941c275dae1f58b35f850
  1. LICENSE
  2. README
  3. __init__.py
  4. demo/
  5. java/
  6. src/
  7. states.dot
  8. test/