Bug 925398 - Refactor runtests.py to follow Mixin pattern, r=jgriffin, a=test-only
Bug 925398 - Refactor runtests.py to follow Mixin pattern, r=jgriffin, followup patch, a=test-only
Bug 949406 - Bump marionette_client version to 0.7.1, r=mdas, a=test-only