fix glusterfs, prx interfaces

Change-Id: If02e0c5635c81d871c321a543f4082c80a11c9c9
diff --git a/classes/cluster/virtual-mcp11-contrail/openstack/dashboard.yml b/classes/cluster/virtual-mcp11-contrail/openstack/dashboard.yml
index 89db1f3..80b36fd 100755
--- a/classes/cluster/virtual-mcp11-contrail/openstack/dashboard.yml
+++ b/classes/cluster/virtual-mcp11-contrail/openstack/dashboard.yml
@@ -8,6 +8,7 @@
 - system.horizon.server.plugin.overrides
 - cluster.virtual-mcp11-contrail
 parameters:
+  linux:
     network:
       interface:
         ens4: