compute: Add missing 2.73 response schema validation

Microversion v2.73 was introduced in Nova by I46edd595e7417c58410648
changing the request responses of ``GET servers/{server_id}``, ``GET
/servers/detail``, ``POST /servers/{server_id}/action``  where the
action is rebuild and ``PUT servers/{server_id}``.

Change-Id: I8c800f6e280ec6fdf204d344124d994a25d0af19
4 files changed