copr: make sure iptables are disabled

For some reason they can be started even if

    baseiptables: False

maybe because the variable was initially set to True
and then switched to False, so the iptables were
already enabled.

tasks/aws_cloud.yml

@@ -133,3 +133,6 @@
 #
 - name: Include SSH config
   import_role: name=basessh
+
+- name: Disable iptables, we have Security Groups in EC2
+  service: name=iptables state=stopped enabled=no