Mistral didn't make use of the oslo_utils "mask_password" methods,
leading in sensitive data leakage in its logs.
This patch corrects this security issue.
Note that it depends on oslo_utils patch adding new patterns, and
ensuring it's case-insensitive.
Change-Id: I544d3c172f2dea02c62c49c311c4b5954413ae15
Related-Bug: #1850843
Co-Authored-By: Dougal Matthews <dougal@redhat.com>
Signed-off-by: Cédric Jeanneret <cjeanner@redhat.com>