fix sat_hostname ksmeta for non-satellite case

Fixes this error:
err:  Failed to apply catalog: Parameter ksmeta failed: Invalid value "redhat_register_user=USERNAME redhat_register_password=PASSWORD redhat_management_type=cert redhat_management_server= ". Valid values match /^((\S+=\S+) +)*(\S+=\S+)*$/. at /etc/puppet/modules/rpmcache/manifests/init.pp:112