Make isolate cache resilient to unexpectedly deleted items.

Make isolate cache resilient to unexpectedly deleted items.

It seems to be a regression. Add a test.

R=agable@chromium.org
BUG=678396
Review-Url: https://codereview.chromium.org/2610273002
Committed: https://github.com/luci/luci-py/commit/ae56b3a60ca775afa9e049fa32470a15ef2e1c13

[agable, 2017-01-05 00:07:35]

LGTM. Not familiar with the code, but code makes sense and test looks good.

[Vadim Sh., 2017-01-05 00:09:10]

The CQ bit was checked by vadimsh@chromium.org

[commit-bot: I haz the power, 2017-01-05 00:09:18]

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, 2017-01-05 00:42:46]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1483574950350490, "parent_rev":
"65ee5dceb8a80dff26248fcb4119b8be5273ff76", "commit_rev":
"ae56b3a60ca775afa9e049fa32470a15ef2e1c13"}

[commit-bot: I haz the power, 2017-01-05 00:42:49]

Description was changed from

==========
Make isolate cache resilient to unexpectedly deleted items.

It seems to be a regression. Add a test.

R=agable@chromium.org
BUG=678396
==========

to

==========
Make isolate cache resilient to unexpectedly deleted items.

It seems to be a regression. Add a test.

R=agable@chromium.org
BUG=678396

Review-Url: https://codereview.chromium.org/2610273002
Committed:
https://github.com/luci/luci-py/commit/ae56b3a60ca775afa9e049fa32470a15ef2e1c13
==========

[commit-bot: I haz the power, 2017-01-05 00:42:50]

Committed patchset #1 (id:1) as
https://github.com/luci/luci-py/commit/ae56b3a60ca775afa9e049fa32470a15ef2e1c13