Un-hardcoding stricthostkeychecking for nova user

The patch un-hardcodes stricthostkeychecking ssh paramter for
username located in ~/.ssh/config and adds compute hosts
fingerprint fot all compute nodes in full-mesh manner according
to the below pillar:

nova:
  compute:
    openssh:
      stricthostkeychecking: True
      discover_compute_hosts: True

Change-Id: If698e9465a89902c15852f0cce51e521d4beec9f
Related-PROD: PROD-27457 (PROD:27457)
2 files changed