MuidTrackIsolation was not thread safe (potential cause of crash), due to mutable variables. Fixed it, as well as making public tools private.

Both tools now retrieve the collection they need using a ReadHandle.  No other changes are made to the code.


Former-commit-id: ef6e5784

	* endreq -> endmsg
	* tag as MuidCaloIsolationTools-01-00-01


Former-commit-id: 234f3dc9