RecExCommon: fix legacy monitoring
Fix two problems in the legacy monitoring that is still used in some ART tests:
-
JetTagMonitoring
: Fix bug introduced by !62397 (merged) in legacy configuration. -
AthenaMonitoring
: Lock the flags before running the trigger configuration in the legacy monitoring. Required for some remaining Run-1 RAWtoALL tests.
Relates to ATR-27337.