copr-be: explicitly exit 1 in exit handler in vm-aws-new

Seems like in some situations we return exit status 0.

roles/copr/backend/templates/resalloc/vm-aws-new

@@ -65,6 +65,7 @@ cleanup_actions()
         # it is safe to ask for removal of non-existeng VM (in case the playbook
         # below was shut-down before the VM was even created)
         $delete_script
+        exit 1
     fi
 }
 trap cleanup_actions EXIT