Refs #692: Changed get_interesting to return all PVs when level not specified 
Refs #692: Changed get_interesting to return all PVs when level not specified 


Former-commit-id: 206ff3630beb475b4c457e717b818cd7b23f411b
ISISComputingGroup/EPICS-inst_servers,ISISComputingGroup/EPICS-inst_servers