Butler: fix global tags applied to empty map.

Butler: fix global tags applied to empty map.

BUG=chromium:676409
TEST=None
R=seanmccullough@chromium.org

Review-Url: https://codereview.chromium.org/2601583002
Committed: https://github.com/luci/luci-go/commit/6eccb06f2227ce46fdabf854eb526d10f6878efe

[seanmccullough1, 2016-12-22 23:02:25]

seanmccullough@google.com changed reviewers:
+ seanmccullough@google.com

[seanmccullough1, 2016-12-22 23:02:26]

lgtm

tests?

[dnj, 2016-12-22 23:26:00]

kk added tests

[dnj, 2016-12-22 23:26:04]

The CQ bit was checked by dnj@chromium.org

[dnj, 2016-12-22 23:26:04]

The patchset sent to the CQ was uploaded after l-g-t-m from
seanmccullough@google.com
Link to the patchset: https://codereview.chromium.org/2601583002/#ps20001
(title: "Added tests, testing method to Bundler.")

[commit-bot: I haz the power, 2016-12-22 23:26:15]

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, 2016-12-22 23:32:32]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1482449164269310,
"parent_rev": "294de93752002bee56028b1138c2c58d0837a97d", "commit_rev":
"6eccb06f2227ce46fdabf854eb526d10f6878efe"}

[commit-bot: I haz the power, 2016-12-22 23:32:35]

Description was changed from

==========
Butler: fix global tags applied to empty map.

BUG=chromium:676409
TEST=None
R=seanmccullough@chromium.org
==========

to

==========
Butler: fix global tags applied to empty map.

BUG=chromium:676409
TEST=None
R=seanmccullough@chromium.org

Review-Url: https://codereview.chromium.org/2601583002
Committed:
https://github.com/luci/luci-go/commit/6eccb06f2227ce46fdabf854eb526d10f6878efe
==========

[commit-bot: I haz the power, 2016-12-22 23:32:36]

Committed patchset #2 (id:20001) as
https://github.com/luci/luci-go/commit/6eccb06f2227ce46fdabf854eb526d10f6878efe