milo: fix build/step timing

milo: fix build/step timing

This CL fixes two bugs:
1) confused swarming task StartedTs and CompletedTs
2) hang steps in infrafailed builds stayed Running and we compute their
   duration till now

R=hinoka@chromium.org, estaab@chromium.org
BUG=626853
Committed: https://github.com/luci/luci-go/commit/2d9c0bca8435d223d907cca702bbeb347a6a83b1

[nodir, 2016-07-12 23:59:55]

PTAL

[nodir, 2016-07-14 17:46:49]

after-conf ping

[nodir, 2016-07-15 00:13:56]

Description was changed from

==========
milo: fix build/step timing

This CL fixes two bugs:
1) confused swarming task StartedTs and CompletedTs
2) hang steps in infrafailed builds stayed Running and we compute their
   duration till now

Also reorg swarming test data and symink it into frontend module to avoid
copying.

R=hinoka@chromium.org, estaab@chromium.org
BUG=626853
==========

to

==========
milo: fix build/step timing

This CL fixes two bugs:
1) confused swarming task StartedTs and CompletedTs
2) hang steps in infrafailed builds stayed Running and we compute their
   duration till now

R=hinoka@chromium.org, estaab@chromium.org
BUG=626853
==========

[nodir, 2016-07-15 00:15:26]

rebased on top of https://codereview.chromium.org/2150933004/

[estaab, 2016-07-15 05:24:46]

lgtm

[nodir, 2016-07-16 07:03:01]

The CQ bit was checked by nodir@chromium.org

[commit-bot: I haz the power, 2016-07-16 07:03:08]

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, 2016-07-16 07:04:43]

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

[commit-bot: I haz the power, 2016-07-16 07:04:44]

Try jobs failed on following builders:
  Luci-go Linux Precise 32 Tester on master.tryserver.infra (JOB_FAILED,
https://build.chromium.org/p/tryserver.infra/builders/Luci-go%20Linux%20Preci...)
  Luci-go Linux Trusty 64 Tester on master.tryserver.infra (JOB_FAILED,
https://build.chromium.org/p/tryserver.infra/builders/Luci-go%20Linux%20Trust...)
  Luci-go Mac Tester on master.tryserver.infra (JOB_FAILED,
https://build.chromium.org/p/tryserver.infra/builders/Luci-go%20Mac%20Tester/...)
  Luci-go Presubmit on master.tryserver.infra (JOB_FAILED,
https://build.chromium.org/p/tryserver.infra/builders/Luci-go%20Presubmit/bui...)

[nodir, 2016-07-16 07:10:41]

The CQ bit was checked by nodir@chromium.org

[nodir, 2016-07-16 07:10:42]

The patchset sent to the CQ was uploaded after l-g-t-m from estaab@chromium.org
Link to the patchset: https://codereview.chromium.org/2141013003/#ps50001
(title: "rebase")

[commit-bot: I haz the power, 2016-07-16 07:10:54]

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, 2016-07-16 07:15:03]

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

[commit-bot: I haz the power, 2016-07-16 07:15:04]

Try jobs failed on following builders:
  Luci-go Mac Tester on master.tryserver.infra (JOB_FAILED,
https://build.chromium.org/p/tryserver.infra/builders/Luci-go%20Mac%20Tester/...)
  Luci-go Mac Tester (Swarming) on master.tryserver.infra (JOB_FAILED,
https://luci-milo.appspot.com/swarming/task/300b5cf2c0c74f10)
  Luci-go Presubmit (Swarming) on master.tryserver.infra (JOB_FAILED,
https://luci-milo.appspot.com/swarming/task/300b5cf321671e10)

[nodir, 2016-07-18 18:24:04]

The CQ bit was checked by nodir@chromium.org

[nodir, 2016-07-18 18:24:05]

The patchset sent to the CQ was uploaded after l-g-t-m from estaab@chromium.org
Link to the patchset: https://codereview.chromium.org/2141013003/#ps70001
(title: "retrain")

[commit-bot: I haz the power, 2016-07-18 18:24:07]

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, 2016-07-18 18:37:39]

Description was changed from

==========
milo: fix build/step timing

This CL fixes two bugs:
1) confused swarming task StartedTs and CompletedTs
2) hang steps in infrafailed builds stayed Running and we compute their
   duration till now

R=hinoka@chromium.org, estaab@chromium.org
BUG=626853
==========

to

==========
milo: fix build/step timing

This CL fixes two bugs:
1) confused swarming task StartedTs and CompletedTs
2) hang steps in infrafailed builds stayed Running and we compute their
   duration till now

R=hinoka@chromium.org, estaab@chromium.org
BUG=626853

Committed:
https://github.com/luci/luci-go/commit/2d9c0bca8435d223d907cca702bbeb347a6a83b1
==========

[commit-bot: I haz the power, 2016-07-18 18:37:40]

Committed patchset #5 (id:70001) as
https://github.com/luci/luci-go/commit/2d9c0bca8435d223d907cca702bbeb347a6a83b1