Merge "Remove ``hnas_iscsi`` from the supported storage backends list of Cinder"

ansible/group_vars/all.yml

ansible/roles/cinder/defaults/main.yml

ansible/roles/cinder/tasks/precheck.yml

ansible/roles/cinder/templates/cinder.conf.j2

doc/source/reference/storage/cinder-guide-hnas.rst

doc/source/reference/storage/cinder-guide.rst

etc/kolla/globals.yml

etc/kolla/passwords.yml

...es/remove-cinder-hnas_iscsi-backend-03e6242227b9184c.yaml