Revert "Revert "Install Mirantis theme for Horizon""

This reverts commit 5ca52cdb551fcbbd7e17239f52f3024b3243da7e.

Change-Id: Ia7550d4bef60e66a8e828d047724a09451141a21
diff --git a/classes/cluster/virtual-mcp11-aio/openstack/init.yml b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
index 01153cc..0797dc2 100755
--- a/classes/cluster/virtual-mcp11-aio/openstack/init.yml
+++ b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
@@ -36,6 +36,7 @@
 - service.cinder.volume.single
 - system.cinder.volume.backend.lvm
 - system.horizon.server.single
+- system.horizon.server.plugin.theme
 - system.bind.server.single
 - system.designate.server.single
 - system.designate.server.backend.bind