config+pathfind_test+notifications_test: format and fix newVertex import

Run go fmt so config file is formatted correctly. Also rename
newVertex to NewVertex in pathfind_test and notifications_test
as it is now exported from the routing package.

routing/pathfind_test.go

@@ -300,7 +300,7 @@ func TestBasicGraphPathFinding(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unable to fetch source node: %v", err)
 	}
-	sourceVertex := newVertex(sourceNode.PubKey)
+	sourceVertex := NewVertex(sourceNode.PubKey)
 
 	ignoredEdges := make(map[uint64]struct{})
 	ignoredVertexes := make(map[Vertex]struct{})