
According to the [1], 'user_id', 'type', and 'blob' are all required arguments for 'credential set' but the code treats them as optional. Set the 'required' flag and remove logic supporting missing arguments. [1]: https://github.com/openstack/keystone-specs/blob/master/api/v3/identity-api-v3.rst#credentials-v3credentials "spec" Change-Id: I597c9616ad744385fc6dd92379feb03daec54458 Closes-Bug: #1418837