gob_util.py is a general-purpose library for communicating with the
gerrit-on-borg service.

testing_support/gerrit_test_case.py is a unittest framework for
testing code that interacts with gerrit.

R=vadimsh@chromium.org, cmp@chromium.org
BUG=

Review URL: https://codereview.chromium.org/26399002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@228965 0039d316-1c4b-4281-b951-d872f2087c98