Cast the log file list as a list
Cast the log file list as a list

The log file list, when empty, is cast as a string containing "set()",
which produces a broken log config file.

Closes-Bug: #1716138
Change-Id: If429ba3b63252d066db5a410b80ff29e813d96e1

openstack/openstack-ansible-rsyslog_client,openstack/openstack-ansible-rsyslog_client