[EDGEPOD-226] Add installing strongswan to router role

Also fixed ansible-lint failures

Change-Id: I78fbab0a9e2f45ea4f5989c255f09b47ef01bdcc
diff --git a/aether-playbook/roles/k8s/tasks/k8s.yml b/aether-playbook/roles/k8s/tasks/k8s.yml
index 1561d1a..1fc73f6 100644
--- a/aether-playbook/roles/k8s/tasks/k8s.yml
+++ b/aether-playbook/roles/k8s/tasks/k8s.yml
@@ -35,6 +35,7 @@
     msg: k8s_roles {{ k8s_roles }}
   tags: k8s
 
+# TODO: Wait until K8S cluster is ready
 - name: Install k8s
   command: >-
     docker run -d --privileged --restart=unless-stopped --net=host
@@ -45,4 +46,5 @@
     --token {{ rancher_cluster_token }}
     --ca-checksum {{ rancher_ca_checksum }}
     {{ k8s_roles }}
+  changed_when: False
   tags: k8s