Remove unused config dir for OVN metadata-agent
Remove unused config dir for OVN metadata-agent

This patch is removing a config dir from the command line to the OVN
metadata agent. This directory is empty so can be removed as no config
will be loaded from it.

Change-Id: I66e88f018fbef355ff9cc1feea2b15f2b00cefaa
Signed-off-by: Daniel Alvarez <392af6018b88c256f4a2770258d802fccb5f3af6@redhat.com>

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates