Add field_specs to all metrics in luci-py

Roll infra_libs and gae_ts_mon in luci-py, and add field_specs to all metrics

BUG=684974
Review-Url: https://codereview.chromium.org/2709453002
Committed: https://github.com/luci/luci-py/commit/9ba306ed3b72c50f41f7a16e94e744b07bb46dc4

[dsansome, 2017-02-20 06:03:59]

Description was changed from

==========
Add field_specs to all metrics in luci-py

BUG=684974
==========

to

==========
Roll infra_libs and gae_ts_mon in luci-py, and add field_specs to all metrics

BUG=684974
==========

[dsansome, 2017-02-20 06:06:50]

dsansome@chromium.org changed reviewers:
+ sergeyberezin@chromium.org, vadimsh@chromium.org

[Vadim Sh., 2017-02-20 20:13:31]

lgtm

[dsansome, 2017-02-20 23:24:56]

The CQ bit was checked by dsansome@chromium.org

[commit-bot: I haz the power, 2017-02-20 23:25:03]

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, 2017-02-21 00:00:26]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1487633096667580,
"parent_rev": "da581c1f2c2cedb47c6a97cd9c916266c9c2ae65", "commit_rev":
"9ba306ed3b72c50f41f7a16e94e744b07bb46dc4"}

[commit-bot: I haz the power, 2017-02-21 00:00:28]

Description was changed from

==========
Roll infra_libs and gae_ts_mon in luci-py, and add field_specs to all metrics

BUG=684974
==========

to

==========
Roll infra_libs and gae_ts_mon in luci-py, and add field_specs to all metrics

BUG=684974

Review-Url: https://codereview.chromium.org/2709453002
Committed:
https://github.com/luci/luci-py/commit/9ba306ed3b72c50f41f7a16e94e744b07bb46dc4
==========

[commit-bot: I haz the power, 2017-02-21 00:00:29]

Committed patchset #2 (id:20001) as
https://github.com/luci/luci-py/commit/9ba306ed3b72c50f41f7a16e94e744b07bb46dc4

[M-A Ruel, 2017-02-21 14:38:38]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/2708113002/ by maruel@chromium.org.

The reason for reverting is: Reverting because rolling this version would break
the instances..