Add bw-compat. for "refactor MAAS power processing"

  * Auto-convert:
    power_password => power_pass
    power_nova_id => nova_id
    power_os_tenantname => os_tenantname
    power_os_username => os_username
    power_os_password => os_password
    power_os_authurl => os_authurl
  * Add notify about

Change-Id: Ice1afd9b77d9428c42e3ef905f85990ad5030640
Closes-Bug: PROD-24570 (PROD:24570)
Related-Bug: PROD-21897 (PROD:21897)
2 files changed