[EDGEPOD-226] Add installing strongswan to router role

Also fixed ansible-lint failures

Change-Id: I78fbab0a9e2f45ea4f5989c255f09b47ef01bdcc
diff --git a/aether-playbook/inventory/sample/inventory.ini b/aether-playbook/inventory/sample/inventory.ini
index 1a8b175..e04694d 100644
--- a/aether-playbook/inventory/sample/inventory.ini
+++ b/aether-playbook/inventory/sample/inventory.ini
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # List of all nodes
-menlo-edge ansible_host=10.212.73.3
+menlo-edge ansible_host=10.92.1.32
 
 # Specify a node to run k8s control plane and etcd
 # Note that the number of the nodes must be odd