Removed a bug that caused the Lab to show ePPNs instead of clear text names for users that have mixed-case uids in RBAC; now getNames always returns lowercase eppns.

git-svn-id: https://textgridlab.org/svn/textgrid/trunk/middleware/tgauth@6697 7c539038-3410-0410-b1ec-0f2a7bf1c452