Move ratings description + value to db

EV-124

* There's a new ratingsmgr and hbm file. The ratings are stored in
  the portlet context
* The rate description, value and appointment come from the db instead
  of the language file
Remove extra rating sort, update comment and fix typo

EV-124

* The mapByAppointmentByAppointmentType was sorting the ratings, but
  the sql was already sorting them. Removed code not needed anymore.
* There was a typo in the jsp file
* Updated comments in Mgr class
Merge pull request #1 from osu-mist/feature/EV-124-rating-db

Move ratings description + value to db