Merge "Fix container config files directory path"

docker/base/start.sh

 #!/bin/bash
 set -o errexit
 
-# Processing /opt/kolla/config_files/config.json as root.  This is necessary
+# Processing /var/lib/kolla/config_files/config.json as root.  This is necessary
 # to permit certain files to be controlled by the root user which should
 # not be writable by the dropped-privileged user, especially /run_command
 sudo -E kolla_set_configs