After live-migration of VM is completed, tunnel flow for migrated instance was not added into the new Compute Node

Steps:

• Create a network
• Create a VM in Compute_1 node
• Perform live-migration
  nova live-migration <VM_ID> <Compute_2 node>
• Ping operation between DHCP and VM
  ip netns exec qdhcp-<network_ID> ping -c <VM_IP_ADDRESS>

Observation:

• Before live-migration, the ping operation between DHCP and VM was successful.
• After VM migrated from Compute_1 node Compute_2 node, the ping fails.
• Once the migration happened in new compute node (Compute_2) the tunnel flow for the VM is missing.
• Multiple flow entries for the same VM in table:110
  Before_migration/ovs_comp2.log -> 2 similar entries in table:110 for DHCP Agent.One with additional match attribute on priority and the other without.
  Before_migration/ovs_ctrl.log -> 2 entries for the VM one with priority and the other without.