This patch set fixes all Magnum issues in kolla master.

The [trust] section set to magnum.conf
using created trustee domain and user for Magnum
in ansible/roles/magnum/tasks/register.yml using ansible
openstack modules.

Bump shade to 1.5.0 in kolla-toolbox because of
os_user_role ansible module dependency.

Certificate storage is changed from 'local' (non-production)
to magnum's internal storage (x509keypair) or barbican.

Co-Authored-By: Martin Matyas <martinx.maty@intel.com>
Change-Id: Ifcb016c0bc4c8c3fc20e063fa05dc8838aae838c
Closes-Bug: #1551992