Travis WikiPage::doEditContent

No sure why WikiPage::doEditContent: No transaction to commit is returned
but using @group Database with temporary tables seems to create some
issue when simulating WikiPage::doEditContent in
* testOnArticlePurge
* testOnNewRevisionFromEditComplete

I might have to create a real mock/stub but that is some work ...

Change-Id: I76052c27c9c0e4c98fb73ddde6b91261b453b88e
Merge "Travis WikiPage::doEditContent"