add runtest role

Change-Id: Icb8fdc544159aa7a205a812fbf639f047192c61d
diff --git a/inventory_examples/physical_inventory.yaml b/inventory_examples/physical_inventory.yaml
index c87e92a..766a858 100644
--- a/inventory_examples/physical_inventory.yaml
+++ b/inventory_examples/physical_inventory.yaml
@@ -93,3 +93,7 @@
           role: single_mgm
         enp2s0f1:
           role: bond0_ab_dvr_vlan_ctl_prv_floating
+
+default_context:
+    manila_enabled: 'False'
+    barbican_enabled: 'False'