The current puppet-opendaylight acceptance tests curl against this ODL NB REST API URL:

spec/spec_helper_acceptance.rb:485: odl_check_url = 'http://127.0.0.1:8181/restconf'

I noticed that puppet-neutron uses a different odl_check_url:

manifests/plugins/ovs/opendaylight.pp:94: $odl_check_url = 'http://127.0.0.1:8080/restconf/operational/network-topology:network-topology/topology/netvirt:1',
spec/classes/neutron_plugins_ovs_opendaylight_spec.rb:7: :odl_check_url => 'http://127.0.0.1:8080/restconf/operational/network-topology:network-topology/topology/netvirt:1',

I think those should actually be diagstatus (and will work on that, see https://bugzilla.redhat.com/show_bug.cgi?id=1642270). But still, eventually we should consider if we're using the ideal URL in these tests.