this patchset has implemented:
  - network (lb-mgmt-net)
  - security groups and rules (used by amphora and health manager)
  - amphora flavor (used by amphora)
  - nova keypair (used by amphora at the time of debugging)

Add a octavia_amp_listen_port variable which used by amphora
Add amp_image_owner_id in octavia.conf

Implements: blueprint implement-automatic-deploy-of-octavia
Co-Authored-By: zhangchun <zhangchun@yovole.com>

Depends-On: https://review.opendev.org/652030

Change-Id: I67009d046925cfc02c1e0073c80085c1471975f6