Fixed bug in RecMoniConf exposed when datatype not set to Upgrade
This fixes an error in the nightly tests for the Alignment project:
File "/workspace/build/Rec/InstallArea/x86_64-centos7-gcc9-opt/python/RecConf/Configuration.py", line 364, in applyConf
if seq not in moniDets:
UnboundLocalError: local variable 'moniDets' referenced before assignment
which is because the variable moniDets is only initialized if datatype is set to Upgrade (which happens to be not the default value.)