[EDGEPOD-226] Add installing strongswan to router role

Also fixed ansible-lint failures

Change-Id: I78fbab0a9e2f45ea4f5989c255f09b47ef01bdcc
diff --git a/aether-playbook/roles/router/tasks/main.yml b/aether-playbook/roles/router/tasks/main.yml
new file mode 100644
index 0000000..a64cd53
--- /dev/null
+++ b/aether-playbook/roles/router/tasks/main.yml
@@ -0,0 +1,30 @@
+# Copyright 2020-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
+  - include_role:
+      name: router/linux
+    when:
+      - router_type == 'linux'
+    tags:
+      - router
+      - vpn
+
+#  - include_role:
+#      name: router/vyos
+#    when:
+#      - router_type == 'vyos'
+#    tags:
+#      - router
+#      - vpn