Revert 52b5e36..4ee186c

This rolls back to commit 52b5e3687b2da4452d3ec4dbdb3b3f6d72b62f6f.
New else condition to avoid errors on comment

Added else condition to avoid error if user role is not found when
adding new comment. If user role is not found, user is considered to be
a citizen.

Distinguished Site Administration from City Administration, for the
sake of the pilot usage.

Finally working, now tested.