Deprecate old auth parameters of ironic in nova.conf
Deprecate old auth parameters of ironic in nova.conf

The auth parameters `admin_username`, `admin_password`,
`admin_tenant_name` and `admin_url` of the [ironic] config
option group are now deprecated and will be removed in a
future release. Using these parameters will log a warning.
Please use `username`, `password`, `project_name `and
`auth_url` instead.

Change-Id: I9e383788e35b83888b3b5cf927f67b0f3b4ef54b
Closes-Bug: 1619266

coolsvap/kolla,mandre/kolla,dardelean/kolla-ansible,openstack/kolla,dardelean/kolla-ansible,mrangana/kolla,GalenMa/kolla,rahulunair/kolla,stackforge/kolla,mandre/kolla,coolsvap/kolla,mandre/kolla,stackforge/kolla,stackforge/kolla,intel-onp/kolla,openstack/kolla,dardelean/kolla-ansible,intel-onp/kolla,nihilifer/kolla,rahulunair/kolla,GalenMa/kolla,coolsvap/kolla,nihilifer/kolla,mrangana/kolla