update the requirement.txt to ansible 2.x

playbooks/roles/launch_ec2/tasks/main.yml

@@ -10,6 +10,7 @@
     # tags:
     #   - Name: "{{ name_tag }}"
     module: ec2_remote_facts
+    region: "{{ region }}"
     filters:
       instance-state-name: running
       "tag:Name": "{{ name_tag }}"