codeintel: xml catalogs: always sort public ids, system ids, and namespaces
http://bugs.activestate.com/show_bug.cgi?id=100050

(integrated from komodo (trunk) change 81845 by marky)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13595 b87d16e7-d29f-4ee1-b5ec-817d645d335f