This patch removes the dependency from ironicclient to
communicate with neutron in favor of openstacksdk.
Also:
* Use import keystoneauth1.loading as ks_loading accross
the project.
* Refactor to have one 'get_client' function, removing the
'_get_config_client' method. Setting config_client=True
when calling 'get_client' returns a client using auth
options values from conf parameters.
Depends-On: https://review.opendev.org/735601
Change-Id: Ib6c0fa2acfc33deb9c5b36ae724d5d8304d1dd29
ff00047b4a