Mark test_sysctl_variables as xfail PROD-31892

Related-prod: #PROD-31892(PROD:31892)
Change-Id: I727786c49dafabd07e99d82a8426cf76ccd626a5
diff --git a/test_set/cvp-sanity/tests/test_kernel_settings.py b/test_set/cvp-sanity/tests/test_kernel_settings.py
index 210c5c4..fa1d946 100644
--- a/test_set/cvp-sanity/tests/test_kernel_settings.py
+++ b/test_set/cvp-sanity/tests/test_kernel_settings.py
@@ -1,6 +1,8 @@
+import pytest
 import json
 
 
+@pytest.mark.xfail(reason='PROD-31892')
 def test_sysctl_variables(local_salt_client, nodes_in_group):
     """
     # Request kernel setting from linux:system:kernel:sysctl