Fix recipes.py test train when on-disk expectation files are invalid

Fix recipes.py test train when on-disk expectation files are invalid

BUG=chromium:712828
Review-Url: https://codereview.chromium.org/2850543002
Committed: https://github.com/luci/recipes-py/commit/d84fead2a2eb7e0fe72c928fca0086df619509d9

[Paweł Hajdan Jr., 2017-04-27 15:25:57]

The CQ bit was checked by phajdan.jr@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-27 15:26:01]

Dry run: 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, 2017-04-27 15:28:50]

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

[commit-bot: I haz the power, 2017-04-27 15:28:51]

Dry run: This issue passed the CQ dry run.

[Paweł Hajdan Jr., 2017-04-27 15:30:16]

phajdan.jr@chromium.org changed reviewers:
+ iannucci@chromium.org

[iannucci, 2017-04-27 15:58:19]

lgtm

[Paweł Hajdan Jr., 2017-04-27 18:20:53]

The CQ bit was checked by phajdan.jr@chromium.org

[commit-bot: I haz the power, 2017-04-27 18:21:05]

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, 2017-04-27 18:23:56]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493317253661940, "parent_rev":
"8b7295c5344ed0cb6ed7843f9df2c6b58a015fe5", "commit_rev":
"d84fead2a2eb7e0fe72c928fca0086df619509d9"}

[commit-bot: I haz the power, 2017-04-27 18:23:59]

Description was changed from

==========
Fix recipes.py test train when on-disk expectation files are invalid

BUG=chromium:712828
==========

to

==========
Fix recipes.py test train when on-disk expectation files are invalid

BUG=chromium:712828

Review-Url: https://codereview.chromium.org/2850543002
Committed:
https://github.com/luci/recipes-py/commit/d84fead2a2eb7e0fe72c928fca0086df619...
==========

[commit-bot: I haz the power, 2017-04-27 18:24:00]

Committed patchset #1 (id:1) as
https://github.com/luci/recipes-py/commit/d84fead2a2eb7e0fe72c928fca0086df619...