Fix the bug of showing '1/1' of 'Subtest Pass Rate' when
the result of the reftest(or manual test) is not 'PASS'.
Merge pull request #1009 from BruceDai/FixSubtestsPassRateBug

Fix the bug of showing '1/1' of 'Subtest Pass Rate' when the result of the reftest(or manual test) is not 'PASS'.