Phase out tests/jasmine; Update mediawiki i18n tests

Phase out tests/jasmine; Update mediawiki i18n tests

Updated script for generating mediawiki.jqueryMsg sample
data to be generic instead of Jasmine specific

Removed mediawiki.jqueryMsg.spec.js
* The bulk of the tests were already in QUnit (did that a
  while ago)
* The little $.each loop over the sample data is now in
  QUnit as well.
* Made it so that it doesn't need a hardcoded copy of
  languageClasses but instead pulls it from load.php
  on-demand and then restores mw.language later on.

The mediawiki.jqueryMsg.test module now has several failures
which is annoying but should not block the merge for now
because they were failing under Jasmine as well, this is a
known bug in jqueryMsg, a few cases don't work in js yet.
To be investigated (12/66 fail currently).

Change-Id: I243d055d6f5129fd9fd760943d05c7cd210d84bf