Escape username when populating group and username is already a JID. Potential fix for JM-695.

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk@4313 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/wildfire/ldap/LdapGroupProvider.java

@@ -487,7 +487,8 @@ public class LdapGroupProvider implements GroupProvider {
                             }
                             else {
                                 // This is a JID of a component or node of a server's component
-                                userJID = new JID(username);
+                                String escapedUsername = JID.escapeNode(username);
+                                userJID = new JID(escapedUsername);
                             }
                             members.add(userJID);
                         }