static_registry: update the test for the new struct

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)

registry/registry_test.go

@@ -22,11 +22,11 @@ func spawnTestRegistry(t *testing.T) *Registry {
 }
 
 func TestPingRegistryEndpoint(t *testing.T) {
-	standalone, err := pingRegistryEndpoint(makeURL("/v1/"))
+	regInfo, err := pingRegistryEndpoint(makeURL("/v1/"))
 	if err != nil {
 		t.Fatal(err)
 	}
-	assertEqual(t, standalone, true, "Expected standalone to be true (default)")
+	assertEqual(t, regInfo.Standalone, true, "Expected standalone to be true (default)")
 }
 
 func TestGetRemoteHistory(t *testing.T) {