Revert "Return "1" to CLI if not all unit tests pass.".  We're not successfully
passing back $all_passed because the function doesn't take it by reference.  Which
is my fault because I gave Jozefs bad advice.  But I don't think it's necessary anyway
so I'm going to try a different approach.

This reverts commit 4fe07c6b0a341b0b99ee1b051f7c0bdfda572e04.

Conflicts:
	modules/gallery_unit_test/controllers/gallery_unit_test.php
Set exit status to the number of failed tests.  This should fix issues with Travis.
Merge branch 'master' of github.com:gallery/gallery3