fix the duplicate entry of rabbitmq_refresh

playbooks/roles/launch_ec2/tasks/main.yml

@@ -59,6 +59,7 @@
         volume_type: gp2
         volume_size: "{{ root_ebs_size }}"
         delete_on_termination: true
+        encrypted: False
     zone: "{{ zone }}"
     instance_profile_name: "{{ instance_profile_name }}"
   register: ec2