selftests: tc-testing: return fail if a test fails in setup/teardown

As of today tests throwing exceptions in setup/teardown phase are
treated as skipped but they should really be failures.

Signed-off-by: Pedro Tammela <[e-mail]>
Reviewed-by: Davide Caratti <[e-mail]>
Acked-by: Jamal Hadi Salim <[e-mail]>
Reviewed-by: Davide Caratti <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

tools/testing/selftests/tc-testing/tdc.py

···
             message = pmtf.message
             output = pmtf.output
             res = TestResult(tidx['id'], tidx['name'])
-            res.set_result(ResultState.skip)
+            res.set_result(ResultState.fail)
             res.set_errormsg(pmtf.message)
             res.set_failmsg(pmtf.output)
             tsr.add_resultdata(res)