Enable config of route-tables and monitoring in packet devices

Device OpenConfig Driver:
- add missing template
- implement filter to avoid sending empty edit-config requests

Service L3NM-Emulated ServiceHandler:
- implement missing rule to configure routing tables in packet devices

Service L3NM-OpenConfig ServiceHandler:
- implement missing rule to configure routing tables in packet devices

Monitoring:
Reduced default sampling rate to adapt to Infinera devices