As of [1], the ironic configuration for neutron, glance, swift,
inspector and service_catalog requires explicit configuration of
authentication parameters for communication with these services.

This change adds the required parameters to [neutron], [glance] and
[inspector] sections of ironic.conf. Kolla-ansible does not configure
the [swift] or [service_discovery] sections currently.

We also replace option [glance] glance_hosts with [glance]
glance_api_servers as the former is deprecated.

Since we no longer need to support generating configuration for
kolla-kubernetes[2], some related options have been cleaned.

[1]
https://github.com/openstack/ironic/commit/4f9035c24f0465be5728ed9a8a6df76cd6f46ed3
[2]
https://blueprints.launchpad.net/kolla-ansible/+spec/clean-k8s-config

Change-Id: Ifc239af5f3e44a508fedc9dea08cb06160c4f7f3
Closes-Bug: #1701713