Change-Id: I0d66e49f09313de8abb89f510c7a5098507c572a

For now, we use api interface/network for Octavia.

This change will make more flexible for Octavia deployment
with Kolla when we want to use another network for managing
amphora instances (config, health check, clean up)

Change-Id: Ief12f1f8b6c7d3974932e6320af95bb58d46bdb9
Co-Authored-By: Duc Nguyen Cong <ducnc7@viettel.com.vn>
Closes-Bug: #1791207