Allow reruns for test_json and test_xml tests

These tests have been unstable under TSAN in the past, but it appears
that the same failure mode can happen outside of TSAN tests as well.
These tests have produced 12 failures combined in the past three weeks
in nightlies.

(cherry picked from commit 66f6f4bba9)

bin/tests/system/isctest/mark.py

@@ -54,10 +54,6 @@ def is_dnsrps_available():
     return True
 
 
-def with_tsan(*args):  # pylint: disable=unused-argument
-    return feature_test("--tsan")
-
-
 have_libxml2 = pytest.mark.skipif(
     not feature_test("--have-libxml2"), reason="libxml2 support disabled in the build"
 )

bin/tests/system/statschannel/tests_json.py

@@ -119,6 +119,6 @@ def test_zone_with_many_keys_json(statsport):
     )
 
 
-@isctest.mark.flaky(max_runs=2, rerun_filter=isctest.mark.with_tsan)
+@isctest.mark.flaky(max_runs=2)
 def test_traffic_json(statsport):
     generic.test_traffic(fetch_traffic_json, statsip="10.53.0.2", statsport=statsport)

bin/tests/system/statschannel/tests_xml.py

@@ -148,6 +148,6 @@ def test_zone_with_many_keys_xml(statsport):
     )
 
 
-@isctest.mark.flaky(max_runs=2, rerun_filter=isctest.mark.with_tsan)
+@isctest.mark.flaky(max_runs=2)
 def test_traffic_xml(statsport):
     generic.test_traffic(fetch_traffic_xml, statsip="10.53.0.2", statsport=statsport)