This helps to earlier find/repair any unsynced part in OVN DB.
The log output can combine with loki to generate really helpfull alerts,
so we don't need to wait for environment network package flow to
break down first to understand our OVN db got out of sync.
Change-Id: I2c385ba71677c5b06e8fdf9efed6bba4f2ae8a6d
e836021061