Add missing code for Metrics and PV/PVC elimination
Earlier patch introducing MeterRegistry to AbstractComponentFunction
was not initializing the lateinit property and causing NPE.
Also add additional code to handle compatibility issues after the
introduction of PV/PVC elminiation for CommandExecutor. This allows
blueprintsprocessor to communicate with earlier versions of command-
executor which still use the shared pvc.
Issue-ID: CCSDK-3471
Change-Id: I84a04601c4fe09c5f3a06664ce877800a30531f1
Signed-off-by: Jozsef Csongvai <jozsef.csongvai@bell.ca>