Core/Dungeon Finder: Fix problems when joining queue

- Fix Rolechecks
- Fix incorrect dungeon stored when queued as individual:
  * Those that joined as random were only matching with others that joined random
  * Teleport location was incorrect.

Closes issue 5161
Updates issue 5162

--HG--
branch : trunk

src/server/game/Server/Protocol/Handlers/LFGHandler.cpp

@@ -116,6 +116,7 @@ void WorldSession::HandleLfgSetRolesOpcode(WorldPacket& recv_data)
         return;
     }
     sLog.outDebug("CMSG_LFG_SET_ROLES [" UI64FMTD "] Roles: %u", guid, roles);
+    sLFGMgr.SetRoles(guid, roles);
     sLFGMgr.UpdateRoleCheck(grp, GetPlayer());
 }