print something useful for default node match
print something useful for default node match

Currently, a default node match just prints out
db_type (which is not entirely useful). This commit
updates the message print the certname.

CiscoSystems/puppet_openstack_builder--to-be-deleted,CiscoSystems/puppet_openstack_builder--to-be-deleted,CiscoSystems/openstack-installer--to-be-replaced-by-puppet_openstack_builder,CiscoSystems/puppet_openstack_builder,CiscoSystems/puppet_openstack_builder--to-be-deleted,phchoic/puppet_openstack_builder,michaeltchapman/puppet_openstack_builder,michaeltchapman/vagrant-consul,michaeltchapman/puppet_openstack_builder,michaeltchapman/vagrant-consul,phchoic/puppet_openstack_builder,michaeltchapman/puppet_openstack_builder,CiscoSystems/openstack-installer--to-be-replaced-by-puppet_openstack_builder,CiscoSystems/openstack-installer--to-be-replaced-by-puppet_openstack_builder,CiscoSystems/puppet_openstack_builder,phchoic/puppet_openstack_builder