AETHER-2697 Add playbook for configuring Aether servers offline

Change-Id: I6a1a338e6c8a4f867fc3221a94ddfa58e253485a
diff --git a/playbooks/aethermgmt-airgap-playbook.yml b/playbooks/aethermgmt-airgap-playbook.yml
new file mode 100644
index 0000000..aabcf73
--- /dev/null
+++ b/playbooks/aethermgmt-airgap-playbook.yml
@@ -0,0 +1,16 @@
+---
+# Ansible playbook to configure an aether management nodes offiline
+
+- name: Configure an aether management node
+  hosts: aethermgmt
+  become: true
+  roles:
+    - netprep
+    - nsd
+    - unbound
+    - chrony
+    - dhcpd
+    - nginx
+    - onieboot
+    - users
+    - docker