gerrit: qa/* IRC notification to #wikimedia-dev

The repositories such as qa/browsertests should not have notification
sent to #mediawiki. #wikimedia-dev seems to be a more appropriate place.

TEST PLAN:

$ python hookhelper_test.py
...............
----------------------------------------------------------------------
Ran 15 tests in 0.003s

OK
$

Change-Id: Id7f0084e961a400bb8c11e812ac6a17e54881d5f
Merge "gerrit: qa/* IRC notification to #wikimedia-dev" into production