Add output of k8s instance IP

Change-Id: I683df9b2370be79e08e4021f3bbb7034aa45d05a
Issue-ID: INT-381
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>
diff --git a/deployment/heat/onap-oom/onap-oom.yaml b/deployment/heat/onap-oom/onap-oom.yaml
index 25dd61b..6241c0a 100644
--- a/deployment/heat/onap-oom/onap-oom.yaml
+++ b/deployment/heat/onap-oom/onap-oom.yaml
@@ -163,3 +163,7 @@
           template:
             get_file: k8s_vm_entrypoint.sh
 
+outputs:
+  k8s_vm_ip:
+    description: The IP address of the k8s instance
+    value: { get_attr: [k8s_vm, first_address] }