Update playbooks for automatic deployment tests

tests/cloud_playbooks/delete-aws.yml

@@ -9,6 +9,8 @@
   - name: Terminate EC2 instances
     local_action:
       module: ec2
+      aws_access_key: "{{ aws_access_key }}"
+      aws_secret_key: "{{ aws_secret_key }}"
       state: absent
       instance_ids: "{{ ansible_ec2_instance_id }}"
       region: "{{ ansible_ec2_placement_region }}"