There is inconsistency on return code nova API return
for "Feature not supported/implemented'. Current return
code are 400, 409, and 403.
- 400 case: Example: Multiattach Swap Volume Not Supported
- 403 case: Cyborg integration
- 409 case: Example: Operation Not Supported For SEV ,
Operation Not Supported For VTPM
In xena PTG, we agreed to fix this by returning 400 in all cases
- L446: https://etherpad.opendev.org/p/nova-xena-ptg
This commit convert all the features not supported error to
HTTPBadRequest(400).
To avoid converting every NotSupported inherited exception
in API controller to HTTPBadRequest generic conversion is
added in expected_errors() decorator.
Closes-Bug: #1938093
Change-Id: I410924668a73785f1bfe5c79827915d72e1d9e03
Ghanshyam Mann