add some utility scripts and update the playbook to verify API connectitivy and image download
Change-Id: I007a2aef68f5c60a4c809cd711aff4d18d87efb9
(cherry picked from commit 2f3df26027e2d64266f3e22a736a6cb491d61468)
diff --git a/roles/compute-node/files/delete-fabric-config b/roles/compute-node/files/delete-fabric-config
new file mode 100755
index 0000000..4ddce2d
--- /dev/null
+++ b/roles/compute-node/files/delete-fabric-config
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+CFG=${1:-"config-tibit.json"}
+
+curl -v -XDELETE -H Content-Type: application/json http://karaf:karaf@onos-fabric:8181/onos/v1/network/configuration