deploy_info: fix -C/-c in bm node list

typo, parameter for specifying column has to be lower case -c

also make xargs not attempting to run bm node show without uuid

Change-Id: I5ae0428df51ca59723eb49829f9ab54d9ef5483e

plugins/tripleo-overcloud/templates/deploy_info.sh.j2

@@ -39,7 +39,7 @@ openstack server list |  awk 'BEGIN {a=0}; /\|/{ if (a>2) print $2} {a=a+1}' | x
 {% if (install.version|default(undercloud_version)|openstack_release) >= 11 %}
 echo "BM node info"
 openstack baremetal node list
-openstack baremetal node list -f value -C UUID | xargs -n 1 openstack baremetal node show
+openstack baremetal node list -f value -c UUID | xargs -r -n 1 openstack baremetal node show
 {% endif %}
 
 echo "Deployments"