PUT SAN retry endpoint missing validation

The below goes through with no errors & returns 200.

[
  {
    "project_id": "0",
    "domain_name": "000",
    "flavor_id": "0",
    "validate_service": false
  }
]

The project_id & flavor_id is invalid, so is domain_name format. With validate_service=False, we should just allow requests to go thru if they are otherwise sane

Expected Response: Should return HTTP 400

Notes from Tony Tan: I agree with the domain_name part, but flavor_id and project_id is not the case.