Populate issue number to test_client_warnings

Author: dkropachev

tests/integration/standard/test_client_warnings.py

@@ -24,10 +24,7 @@
 def setup_module():
     use_singledc()
 
-
-# Failing with scylla because there is no warning message when changing the value of 'batch_size_warn_threshold_in_kb'
-# config")
-@xfail_scylla('Empty warnings: TypeError: object of type \'NoneType\' has no len()')
+@xfail_scylla('scylladb/scylladb#10196 - scylla does not report warnings')
 class ClientWarningTests(unittest.TestCase):
 
     @classmethod