Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  9a7a9db4ed52b8a3269f271652355e0b971540c5

QA: update Ruby gems to pick up new mediawiki-selenium

Removed HTTP:Persistent. This will make tests more slow, but
should also stop the timeouts on slow builds

Bug 66451
Change-Id: I585074f651780d8f0d9d69ebf2d867c0bab73b16