The value of vRtrPimNgAFGenEnableAsmDataMdt specifies whether RP join
on egress is enabled or not.
When the value of vRtrPimNgAFGenEnableAsmDataMdt is set to 'true' RP
join on egress is enabled. When its value is set to 'false' RP join
on egress is disabled and source join is used.
The value of this object is only applicable when vRtrMvpnIpmsiType is
set to 'pim'.