modernize the test_db_buildrequests. RealDB still works. FakeDB failing still.
fake completeBuildRequests working. 23 successes.
added branch and repository support to fake getBuildRequests. 28 successes.
objectid != masterid. 30 successes. 8 failures.
7 errors
fix fake unclaimBuildRequests. 5 errors
support AlreadyClaimedError. 4 errors
fix fake reclaimBuildRequests AlreadyClaimedError. 3 errors
zero failures!