Update cinder-tempest-plugin-lvm-lio (revamp)

The changes should make this job a valid replacement for the legacy
cinder-tempest-dsvm-lvm-lio-barbican job defined inside cinder.git.

- rename as cinder-tempest-plugin-lvm-lio-barbican;
- add it to the gate queue as well, together with
  devstack-plugin-ceph-tempest-py3;
- use the proper functional tox environment provided by cinderlib;
- synchronize the blacklist with the one used by the legacy job,
  and use the same devstack options;
- remove barbicanclient and os-brick from required-projects,
  so that the stable libraries are used, as usual for normal jobs.
  Child jobs can add them if they need to test against
  the master version of those libraries.

And a few minor changes (namespaces for the repositories,
prepare it to be multinode-compatible).

Change-Id: I0ed43c8eda445af8da61d861536da1efdd5a7b1f
diff --git a/roles/change-devstack-data-owner/tasks/main.yaml b/roles/change-devstack-data-owner/tasks/main.yaml
new file mode 100644
index 0000000..bd1977a
--- /dev/null
+++ b/roles/change-devstack-data-owner/tasks/main.yaml
@@ -0,0 +1,6 @@
+- name: Change the owner of specific devstack data files
+  file:
+    path: "{{ devstack_data_dir }}/{{ devstack_data_subdir_changed }}"
+    owner: "{{ devstack_data_subdir_owner }}"
+    recurse: yes
+  become: yes