Defining OVN provider agent is required for the OVN driver as it is
responsible for connection to NB DB and listens to the events in it.
Without the any provider being enabled octavia-driver-agent service is
not doing anything. Moreover, assinged FIP to the LB VIP will not be
working properly, as that needs update to the LB inside of OVN, which
is performed only when agent detects changes to the VIP port.
Change-Id: I82b4cd6749f42220be799c3a3e0d6bc14255125f
03f797df2a