Remove receiver.py, has been moved to gerrit-to-redis project

The gerrit-to-redis project needs renaming at some point in
the future.

Change-Id: I6ad89fad935b49be0eafea86a5312298b63eea4c
Add .gitreview file

Change-Id: I5df4a6f4fe17923f4c5acf2d2de6d787f98d255d
Merge "Remove receiver.py, has been moved to gerrit-to-redis project"
Merge "Add .gitreview file"