neutron_ovn_metadata_agent don`t work after reconnect to new OVN Southbound DB leader

[olmy0414]

**Bug Report**

What happened:
After restart of container with OVN SB_DB leader, neutron_ovn_metadata_agent reconnects to new SB_DB, according agent`s logs.
But then, during spawn of new instances, they don`t obtain metadata from nova.
Metadata agent don`t create any ovn namespaces and related ports, there are no any errors or other info in agent`s log.
As WA, this issue can be resolved by restarting of neutron_ovn_metadata_agent container.

What you expected to happen:
Correct work of neutron_ovn_metadata_agent after reconnect to new OVN Southbound DB leader

How to reproduce it (minimal and precise):
Restart container with OVN SB_DB leader and try to spawn new openstack instance.

**Environment**:
* OS: Ubuntu 20.04.3 LTS
* Kernel: 5.4.0-89-generic
* Docker version: 20.10.8
* Kolla version: 12.2.0
* Container type: ubuntu/binary
* Openstack version: wallaby

[olmy0414 (oleksandr-mykhalskyi)]

please, mark it as duplicate of https://bugs.launchpad.net/kolla-ansible/+bug/1952550

[Michal Nasiadka (mnasiadka)]

Duplicate.