Build patches when omnibot is added as reviewer

Change-Id: I8368d8a491e3275f6c7e5c2e79651285f9a187a8
Remove test code

Change-Id: I995554e8042f3d91744544cf93d47aa0d06f4c32
Properly log errors during processing and set errorstate

Change-Id: I371ae3551fa76592ea9bc1bdc64f3b2349284b7c