Updated mediawiki/extensions
Project: mediawiki/extensions/MassMessage  0ac8b21ccf06703b1172ac4c1e2f8838dce138d3

Don't require context for MassMessage::submit()

Now we only need the user, so just pass that directly instead
of the whole RequestContext, which is uncessary.

Change-Id: I4e47be90d909452735c06d79714138a1a0f0a9e9