fix inventory template issue

Author: abikouo

roles/deploy_flask_app/templates/inventory.yml.j2

@@ -1,8 +1,10 @@
 all:
     hosts:
+        {% for item in deploy_flask_app_workers_instances %}
         {{ item.instance_id }}:
             ansible_host: "{{ item.private_ip_address }}"
             workers_hosts: "{{ deploy_flask_app_workers_join }}"
             ansible_ssh_user: "{{ deploy_flask_app_workers_user_name }}"
             ansible_ssh_common_args: '-o "UserKnownHostsFile=/dev/null" -o StrictHostKeyChecking=no -i {{ deploy_flask_app_workers_ssh_private_key }}'
-            ansible_python_interpreter: auto
+            ansible_python_interpreter: auto
+        {% endfor %}