Multiple issues with Juniper Contrail 2011 on OpenStack Platform 16.1

Issue

There are several issues with Juniper Contrail 2011 running on OpenStack Platform 16.1.

1. Instances lose network connectivity after stack update/deploy or after restarting contrail_vrouter_agent container on compute node.
2. Network service restart fails on compute nodes because of pkt1/2/3 network interfaces config files.
3. NetworkManager service can't be restarted on compute nodes. Can't run 'systemctl daemon-reload'.
4. Openstack update/deploy fails because the path /proc/sys/net/bridge/ doesn't exist. systemd-modules-load.service can't be restarted.
5. Openstack update/deploy fails because it can't restart contrail_config_database_nodemgr container.
6. Contrail containers on compute nodes are recreated on every OpenStack update/deploy.
7. Live migration is not working.