Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  630037e26f08175bdb4d4d12525d6b5e8bf2558b

Restore used namespaces in Action.php

1 patch had taken them out since they were no longer in use.
Another added code that again uses them.
Stuff breaks.

Change-Id: I02d978dac7fd1faffe0a10a3393e8b12062a42a4