Kolla-ansible actually bring it's own barbican-api-paste.ini file to
enable Keystone authentication, in order to fix this
https://bugs.launchpad.net/kolla/+bug/1625337
auth_token middleware is actually managed by Barbican.
Furthermore barbican-api-paste.ini brings by Kolla-ansible is outdated:
* http_proxy_to_wsgi middleware is missing
Hence this file should not be managed statically by kolla-ansible.
This patch keep custom paste file feature. Just put the file to
/etc/kolla/config/barbican/barbican-api.ini path.
Change-Id: Ia50237f7df7f89526a976575b017145c71b11ec0
Closes-bug: #1695026
08ab3d8e73