CommitQueueSyncStage: Fix --debug run case.

When run with --debug and no CIDB credentials, the master-paladin config
would fail by using a db connection of None.

Work around that.

BUG=None
TEST=bin/cbuildbot --buildroot ~/tmp/build_master --debug --buildbot
       --branch master --buildnumber 37 master-paladin

Change-Id: I9f4e1ef2157124c268252b1c8e5fc59f85049826
Reviewed-on: https://chromium-review.googlesource.com/310874
Commit-Ready: Don Garrett <dgarrett@chromium.org>
Tested-by: Don Garrett <dgarrett@chromium.org>
Reviewed-by: Paul Hobbs <phobbs@google.com>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
1 file changed