Skip Java UDF tests on Scylla instead of xfailing them

I suspect that executing those tests is causing other failures we see
in CI. Also, executing them on Scylla is pointless, since we don't support
functionality used by them, so it's just makes pipeline run longer.

Author: Lorak-mmk

tests/integration/__init__.py

@@ -372,15 +372,15 @@ def _id_and_mark(f):
 # 1. unittest doesn't skip setUpClass when used on class and we need it sometimes
 # 2. unittest doesn't have conditional xfail, and I prefer to use pytest than custom decorator
 # 3. unittest doesn't have a reason argument, so you don't see the reason in pytest report
-requires_collection_indexes = pytest.mark.xfail(SCYLLA_VERSION is not None and Version(SCYLLA_VERSION.split(':')[1]) < Version('5.2'),
+requires_collection_indexes = pytest.mark.skipif(SCYLLA_VERSION is not None and Version(SCYLLA_VERSION.split(':')[1]) < Version('5.2'),
                                               reason='Scylla supports collection indexes from 5.2 onwards') 
-requires_custom_indexes = pytest.mark.xfail(SCYLLA_VERSION is not None, 
+requires_custom_indexes = pytest.mark.skipif(SCYLLA_VERSION is not None,
                                           reason='Scylla does not support SASI or any other CUSTOM INDEX class')
-requires_java_udf = pytest.mark.xfail(SCYLLA_VERSION is not None,
+requires_java_udf = pytest.mark.skipif(SCYLLA_VERSION is not None,
                                     reason='Scylla does not support UDFs written in Java')
-requires_composite_type = pytest.mark.xfail(SCYLLA_VERSION is not None,
+requires_composite_type = pytest.mark.skipif(SCYLLA_VERSION is not None,
                                             reason='Scylla does not support composite types')
-requires_custom_payload = pytest.mark.xfail(SCYLLA_VERSION is not None or PROTOCOL_VERSION < 4,
+requires_custom_payload = pytest.mark.skipif(SCYLLA_VERSION is not None or PROTOCOL_VERSION < 4,
                                             reason='Scylla does not support custom payloads. Cassandra requires native protocol v4.0+')
 xfail_scylla = lambda reason, *args, **kwargs: pytest.mark.xfail(SCYLLA_VERSION is not None, reason=reason, *args, **kwargs)
 incorrect_test = lambda reason='This test seems to be incorrect and should be fixed', *args, **kwargs: pytest.mark.xfail(reason=reason, *args, **kwargs)

tests/integration/standard/test_metadata.py

@@ -1474,7 +1474,7 @@ def test_index_follows_alter(self):
         self.assertIsInstance(table_meta.indexes[idx], IndexMetadata)
         self.drop_basic_table()
 
-
+@requires_java_udf
 class FunctionTest(unittest.TestCase):
     """
     Base functionality for Function and Aggregate metadata test classes