Add/Remove Hot plug interface on VM1/VM2 does not resume ping traffic on any VM in the same host in LNT Feature

[stadju]

Scenario 1:

Create vhost-user ports using gnmi cli
Hotplug add/del port to the VM multiple times
Create physical ports and TAP ports
Follow remaining LNT procedure.
Ping works in scenario 1 between 2 VMs.

Scenario 2:

Create the ports hotplug port to VM, set pipeline (follow complete LNT procedure)
Check overlay and underlay ping traffic
Delete the hotplugged port
Hotplug add the port
Check the ping again
In scenario 2, ping doesn't work.