Fix testGetCanonicalName PHPUnit test:

Fix testGetCanonicalName PHPUnit test:

* assertEquals takes expected, prior to actual
  https://phpunit.de/manual/3.7/en/writing-tests-for-phpunit.html#writing-tests-for-phpunit.assertions.assertEquals
* ' trailing space ' test was failing with wgCapitalLinks false.  Since the test is not about that,
  I changed it to ' Trailing space '.  The alternative would be to force wgCapitalLinks to true
  with setMwGlobals or skip the test if it's true.

Change-Id: I677273045bdabb6248ffe2c2f003a3673b3fa51c