Comment 1 for bug 1781749

Probably this is a pre-existing bug in R5.0 GA too.
In which case if someone wants to upgrade they may need to do below on all the computes during upgrade to not lose the existing VM info (change the name of the container as need be)
1) 'docker cp vrouter_vrouter-agent_1:/var/lib/contrail /tmp/bkup/contrail'
2) Upgrade the cluster
3) for dir in $(ls /tmp/bkup/contrail/); do docker cp /tmp/bkup/contrail/$dir vrouter_vrouter-agent_1:/var/lib/contrail; done
4) docker restart vrouter_vrouter-agent_1