Comment 0 for bug 1871427

Currently, the ovn_driver and ovn_metadata are not good in indicating
failure to connect to the ovn database. That makes it hard to know when
it is working properly.

refs:
https://github.com/openstack/neutron/blob/75f6f624bcc0b88b2ae38c49298668ada8e093b1/neutron/agent/ovn/metadata/ovsdb.py#L50

https://github.com/openstack/ovn-octavia-provider/blob/bbb1755176f50f636af413e88df3f1744a72b149/ovn_octavia_provider/driver.py#L180