- If a port is already under OF control and then hw LLDP transmit is enabled on it...

- If a port is already under OF control and then hw LLDP transmit is enabled on it, controller should discard the hw LLDP packet.
- When we change the name of the Production switch, stale entries should be removed.
- Added Backend APIs to add/delete/get user link configs
- Northbound REST APIs to GET/POST/DELETE user link configs
- Endpoint connected as Production Switch to OF port. If the system-name TLV exists in the hw LLDP packet, it should be used for display.
- Some misc osgi debugging commands.

Signed-off-by: Jason Ye <yisye@cisco.com>