Packer: don't source non-existing file in worker_executor.sh

The /tmp/cloud_init_vars is not created on the worker executor, so
sourcing it will make the script fail. Comment the line out, until we
change the worker implementation to inject this file into the worker
executor using cloud-init.

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

templates/packer/ansible/roles/common/files/worker-initialization-scripts/worker_executor.sh

@@ -2,7 +2,8 @@
 set -euo pipefail
 
 source /etc/os-release
-source /tmp/cloud_init_vars
+# TODO: uncomment, when the cloud_init_vars file is created on the executor
+#source /tmp/cloud_init_vars
 
 # Don't subscribe on fedora
 if [ "$ID" != fedora ]; then