Merge pull request #2728 from erikaharrison-adsk/adsk/bugfix/usdMtlxr…

…eader

Autodesk: Fix testUsdImagingGLMaterialXCustomNodes_customColor failure

(Internal change: 2306170)

pxr/usd/usdMtlx/reader.cpp

@@ -908,7 +908,7 @@ _NodeGraphBuilder::_AddNode(
         // Nodegraphs associated with locally defined custom nodes are added 
         // before reading materials, and therefore get-able here 
         auto nodeGraphPath = usdParent.GetParent().GetPath().AppendChild(
-            TfToken(mtlxNodeDef->getName()));
+            _MakeName(mtlxNodeDef));
         auto usdNodeGraph = UsdShadeNodeGraph::Get(usdStage, nodeGraphPath);
         connectable = usdNodeGraph.ConnectableAPI();
         _SetCoreUIAttributes(usdNodeGraph.GetPrim(), mtlxNode);