Updated mediawiki/extensions
Project: mediawiki/extensions/EventLogging  f6d4b0270ac5aee867da990da818d1df5c4cc30e
null
test isValid

Extract validationCases out of validate test, move eventLog.warn
redefinition into validate test
Add isValid test that does assertFalse() on validationCases.
Still some more to add.

Change-Id: Ie284072116964b1d157aececaa527dad9c680aba