SAK-19866 Auto-groups - ability to assign users randomly
roster's with periods in their titles will cause a stack trace.  This will encode/decode them so they work.


git-svn-id: https://source.sakaiproject.org/svn/site-manage/branches/sakai-2.9.x@123376 66ffb92e-73f9-0310-93c1-f5514f145a0a