Make sure the TES is cleaned by EventLoopMgr before finalize

The LHCb Alignment jobs have to manually update the alignment conditions in memory at finalize, and (since we added support to multi threading in UpdateManagerSvc) that requires that the lock we put in the TES is removed before we update.

Because of that behaviour we found that the TES is not properly cleaned when we exit the event loop after a fix number of events.

Closes LHCBPS-1850