Updated mediawiki/extensions
Project: mediawiki/extensions/EventLogging  75c5930387ea49f5bfb74b23dce39f6d75e82548

Docblock syntax fix (no colon after param name)

Also adds python-pymongo to recommended Ubuntu python packages in README.rst

Change-Id: Id1d0360821100e6e3131b6ff20b66d4605fd9b1c