The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/6917c1134ce58e6961a7d3111416795984383d22

commit 6917c1134ce58e6961a7d3111416795984383d22
Author: Chan <chanli@chromium.org>
Date: Thu Apr 20 19:08:47 2017

[Findit] Consolidate flags when rerun an analysis

Consolidate the 3 flags when rerun an analysis (force, force_try_job and build_completed) to one
since now try jobs are stable.

Check if build completed instead of passing a falg.

Bug:  712886 
Change-Id: I5f4da99b741c39ea951deeeec5a12a456849d0fc
Reviewed-on: https://chromium-review.googlesource.com/482469
Commit-Queue: Chan Li <chanli@chromium.org>
Reviewed-by: Shuotao Gao <stgao@chromium.org>
Reviewed-by: Jeffrey Li <lijeffrey@chromium.org>

[modify] https://crrev.com/6917c1134ce58e6961a7d3111416795984383d22/appengine/findit/handlers/test/process_failure_analysis_requests_test.py
[modify] https://crrev.com/6917c1134ce58e6961a7d3111416795984383d22/appengine/findit/waterfall/test/build_failure_analysis_pipelines_test.py
[modify] https://crrev.com/6917c1134ce58e6961a7d3111416795984383d22/appengine/findit/waterfall/build_failure_analysis_pipelines.py
[modify] https://crrev.com/6917c1134ce58e6961a7d3111416795984383d22/appengine/findit/handlers/process_failure_analysis_requests.py
[modify] https://crrev.com/6917c1134ce58e6961a7d3111416795984383d22/appengine/findit/waterfall/trigger_swarming_tasks_pipeline.py
[modify] https://crrev.com/6917c1134ce58e6961a7d3111416795984383d22/appengine/findit/waterfall/analyze_build_failure_pipeline.py
[modify] https://crrev.com/6917c1134ce58e6961a7d3111416795984383d22/appengine/findit/waterfall/test/trigger_swarming_tasks_pipeline_test.py
[modify] https://crrev.com/6917c1134ce58e6961a7d3111416795984383d22/appengine/findit/handlers/build_failure.py
[modify] https://crrev.com/6917c1134ce58e6961a7d3111416795984383d22/appengine/findit/handlers/test/build_failure_test.py