OF-368 - fixed user-summary.jsp which now returns range=3 instead of -1 for 3 users. fixed DefaultUserProvider.java which did return all users instead of start-range (introduced during removal of duplicate code)

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@11767 b35dd754-fafc-0310-a699-88a17e54d16e