Report import errors when calling delayed gathers.

The call delayed gathers function was missing the error handling present for the regular imports.  Add the missing error handling so that errors are properly reported to the user and as many components as possible are imported.

addons/io_hubs_addon/io/gltf_importer.py

@@ -17,8 +17,18 @@
 
 def call_delayed_gathers():
     global delayed_gathers
+    global import_report
     for gather_import in delayed_gathers:
-        gather_import()
+        gather_import_args = gather_import.__closure__[0].cell_contents
+        blender_host = gather_import_args[2]
+        component_name = gather_import_args[3]
+        try:
+            gather_import()
+        except Exception:
+            traceback.print_exc()
+            print(f"Failed to import {component_name} component on {blender_host.name} continuing on...")
+            import_report.append(
+                f"Failed to import {component_name} component on {blender_host.name}.  See the console for details.")
     delayed_gathers.clear()