[TVMA] Disable xgboost multiclassification test for xgboost>=3.1.0

This is not supported yet.

Author: guitargeek

tmva/tmva/test/rbdt_xgboost.py

@@ -7,6 +7,7 @@
 import ROOT
 import numpy as np
 import json
+import pytest
 
 np.random.seed(1234)
 
@@ -78,6 +79,9 @@ def test_XGBBinary_default(self):
         """
         _test_XGBBinary("default")
 
+    @pytest.mark.xfail(
+        xgboost.__version__ >= "3.1.0", reason="We don't support multiclassification with xgboost>=3.1.0 yet"
+    )
     def test_XGBMulticlass_default(self):
         """
         Test model trained with multiclass XGBClassifier.