Make Gerrit the default for the infra repo
Make Gerrit the default for the infra repo

BUG=skia:5744

Change-Id: Ic469d37b7bb2beed80119909b9e44f3ca82942b3
Reviewed-on: https://skia-review.googlesource.com/2363
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot