add playbook for prerequisites configuration

prereq_ansible_host.yml

@@ -0,0 +1,20 @@
+- hosts: bastion
+  become: true
+  tasks:
+    - name: add EPEL repo
+      package:
+        name:
+          - epel-release
+        state: present
+    - name: install prerequisites
+      package:
+        name:
+          - ansible
+          - ansible-doc
+          - python2-jinja2
+          - python2-shade
+          - python2-jmespath
+          - python-dns
+          - python-openstackclient
+          - python-heatclient
+        state: present