BigSwitch: sync state on disassociate floating ip
BigSwitch: sync state on disassociate floating ip

Sends the state of port's parent network to the backend controller
when a floating IP is disassociated from a port.

Closes-Bug: #1235074
Change-Id: I8375e6564b5d08f1adc7e7aef6affc97c8d03c5e

gkotton/vmware-nsx,gkotton/vmware-nsx