Add eventlogging to batcharchive.

Add eventlogging to batcharchive.

BUG=727985
Review-Url: https://codereview.chromium.org/2923133002
Committed: https://github.com/luci/luci-go/commit/62e811953fad2f91f401c0529649f84cf6dc31b6

[mcgreevy, 2017-06-06 05:21:00]

mcgreevy@chromium.org changed reviewers:
+ tansell@chromium.org

[mithro, 2017-06-06 06:49:14]

lgtm

[mcgreevy, 2017-06-06 06:56:43]

The CQ bit was checked by mcgreevy@chromium.org

[commit-bot: I haz the power, 2017-06-06 06:56:47]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-06-06 06:56:48]

This CL has an open dependency (Issue 2922153002 Patch 20001). Please resolve
the dependency and try again.
If you are sure that there is no real dependency, please use one of the options
listed in https://goo.gl/9Es4OR to land the CL.

[mcgreevy, 2017-06-06 06:58:18]

The CQ bit was checked by mcgreevy@chromium.org

[commit-bot: I haz the power, 2017-06-06 06:58:20]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-06-06 06:58:20]

This CL has an open dependency (Issue 2922153002 Patch 20001). Please resolve
the dependency and try again.
If you are sure that there is no real dependency, please use one of the options
listed in https://goo.gl/9Es4OR to land the CL.

[mcgreevy, 2017-06-16 05:29:48]

The CQ bit was checked by mcgreevy@chromium.org

[mcgreevy, 2017-06-16 05:29:48]

The patchset sent to the CQ was uploaded after l-g-t-m from tansell@chromium.org
Link to the patchset: https://codereview.chromium.org/2923133002/#ps40001
(title: "rebase")

[commit-bot: I haz the power, 2017-06-16 05:29:54]

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, 2017-06-16 05:36:04]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1497590988038160,
"parent_rev": "a6c6b4313a95e83ac50ec1bcbb4c5b996ec822de", "commit_rev":
"62e811953fad2f91f401c0529649f84cf6dc31b6"}

[commit-bot: I haz the power, 2017-06-16 05:36:07]

Description was changed from

==========
Add eventlogging to batcharchive.

BUG=727985
==========

to

==========
Add eventlogging to batcharchive.

BUG=727985

Review-Url: https://codereview.chromium.org/2923133002
Committed:
https://github.com/luci/luci-go/commit/62e811953fad2f91f401c0529649f84cf6dc31b6
==========

[commit-bot: I haz the power, 2017-06-16 05:36:07]

Committed patchset #3 (id:40001) as
https://github.com/luci/luci-go/commit/62e811953fad2f91f401c0529649f84cf6dc31b6