Install Mirantis theme for Horizon

Install Mirantis theme for OpenStack Horizon for AIO deployments

Change-Id: I18e19ecd8765b9035a249eaf0f966da2c6ea70c0
Related-Prod: https://mirantis.jira.com/browse/PROD-17420
(cherry picked from commit 08b960501479eaab9116d3e9ae7e8be5c2fe3d3b)
diff --git a/classes/cluster/virtual-mcp11-aio/openstack/init.yml b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
index ae2146c..492fae5 100755
--- a/classes/cluster/virtual-mcp11-aio/openstack/init.yml
+++ b/classes/cluster/virtual-mcp11-aio/openstack/init.yml
@@ -31,6 +31,7 @@
 - service.cinder.volume.single
 - system.cinder.volume.backend.lvm
 - system.horizon.server.single
+- system.horizon.server.plugin.theme
 - system.bind.server.single
 - system.barbican.server.single
 - service.barbican.server.plugin.simple_crypto