Modify minigraph parser output format so it fit DB schema
Modify configuration templates to fit new schema
Systemd services dependencies are modified so database starts before any configuration consumer
- Add a functionality to get SNMP community from DHCP (option 224)
- Add a functionality to get minigraph from http service instead of using default minigraph
- The url for graph service is passed through DHCP option 225
- This feature is by default disabled. Modify rule/config to enable it on build time, or modify /etc/sonic/graph_service_url on run time.
- Fix a bug that getting hostname from DHCP is not working correctly
