[autotest] Scheduler Log distiller.

Parses scheduler logs and figures out state transitions of a job
or of all jobs in a suite.

Usage: ./log_distiller.py <job or suite job id> <path to logs>

TEST=Ran against scheduler logs I copied locally.
BUG=None

Change-Id: Idad72214ceb3028bf54206c3ae72887b57ffb989
Reviewed-on: https://chromium-review.googlesource.com/196542
Tested-by: Prashanth B <beeps@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
Reviewed-by: Alex Miller <milleral@chromium.org>
Commit-Queue: Prashanth B <beeps@chromium.org>
1 file changed