Mark reduction corner case tests as xfail on databricks until they ca…

…n be fixed (#899)

Signed-off-by: Robert (Bobby) Evans <bobby@apache.org>

integration_tests/src/main/python/hash_aggregate_test.py

@@ -15,6 +15,7 @@
 import pytest
 
 from asserts import assert_gpu_and_cpu_are_equal_collect, assert_gpu_and_cpu_are_equal_sql
+from conftest import is_databricks_runtime
 from data_gen import *
 from pyspark.sql.types import *
 from marks import *
@@ -358,6 +359,7 @@ def test_count_distinct_with_nan_floats(data_gen):
         string_gen, boolean_gen, date_gen, timestamp_gen]
 
 
+@pytest.mark.xfail(is_databricks_runtime(), reason='https://github.com/NVIDIA/spark-rapids/issues/898')
 @pytest.mark.parametrize('data_gen', non_nan_all_basic_gens, ids=idfn)
 def test_generic_reductions(data_gen):
     assert_gpu_and_cpu_are_equal_collect(