test_result: don't set status "PASS" when build fail

When installing the tested software failed, no test result lines
have been created, this should have status FAILED.
6 jobs for fix/test_result_no_test_pass in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-TestRunner1

02:11:06

passed ERP5.PerformanceTest-TestRunner1

00:23:02

failed ERP5.UnitTest-TestRunner1

02:26:22

passed ERP5.CodingStyleTest-TestRunner1

01:21:56

passed ERP5.PerformanceTest-TestRunner1

00:23:02

failed ERP5.UnitTest-TestRunner1

02:05:35