The OVN Octavia provider driver in the OvnProviderHelper
class caches these attributes:
ovn_nbdb_api_for_events
ovn_nb_idl_for_events
ovn_nbdb_api
to not re-create things each time OVN IDL that is used for
handling events is called.
We should be using the Octavia Driver Provider Agent framework
instead to not have those long-running IDLs in the API process.
This change:
- Creates driver provider agent and registers its entry point
- While setting up the driver agent instance, start IDL that
will handle events
- Stop caching ovn_nbdb_api, ovn_nb_idl_for_events and
ovn_nbdb_api_for_events in the OvnProviderHelper class
Change-Id: I0034a48997bd6b95e1b51bfcbd56e8372b35e62f
Closes-bug: #1871355
c6cee92073