Updated mediawiki/extensions
Project: mediawiki/extensions/E3Experiments  c3916ad79e1ed9f7a3e32a3dc4b8c2b786d6e4eb
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Delete space and PHPUnit tests pass!

A stray space in the API PHP file made whatever test came first fail. So
fix it and restore the first test.  (The other fails because Jenkins CI
doesn't have an Admin account, I left it deleted for now.)

Also remove empty setUp, and rename functions checkXxx instead of
assertXxx.

Change-Id: I11b45af55c292f56e6f880956e73b9a5e967dd11