Updates milestone label to use r_commit_pos if available.

Updates milestone label to use r_commit_pos if available.

This CL checks that we are only labeling alerts that have r_commit_pos (and therefore are chromium commits). Added corresponding tests.
BUG=catapult:#2906

Review-Url: https://codereview.chromium.org/2644013004
Committed: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+/93b0aba2c21fd2852645db88beaf62d13364b812

[jessimb, 2017-01-19 22:18:40]

jessimb@chromium.org changed reviewers:
+ eakuefner@chromium.org, sullivan@chromium.org

[jessimb, 2017-01-19 22:18:40]

PTAL. 
Should probably wait until @perezju agrees that end_revision is an okay change
to make.

[sullivan, 2017-01-19 22:30:04]

lgtm

Thanks!

[jessimb, 2017-01-20 18:49:20]

The CQ bit was checked by jessimb@chromium.org

[commit-bot: I haz the power, 2017-01-20 18:49:27]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-20 19:10:05]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484938160891210, "parent_rev":
"b10363eebd3cd42f98e76853c3447170e1dbc321", "commit_rev":
"93b0aba2c21fd2852645db88beaf62d13364b812"}

[commit-bot: I haz the power, 2017-01-20 19:10:08]

Description was changed from

==========
Updates milestone label to use r_commit_pos if available.

This CL checks that we are only labeling alerts that have r_commit_pos (and
therefore are chromium commits). Added corresponding tests.
BUG=catapult:#2906
==========

to

==========
Updates milestone label to use r_commit_pos if available.

This CL checks that we are only labeling alerts that have r_commit_pos (and
therefore are chromium commits). Added corresponding tests.
BUG=catapult:#2906

Review-Url: https://codereview.chromium.org/2644013004
Committed:
https://chromium.googlesource.com/external/github.com/catapult-project/catapu...
==========

[commit-bot: I haz the power, 2017-01-20 19:10:09]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/github.com/catapult-project/catapu...