[test-infra] Fix the bug of showing '1/1' of 'Subtest Pass Rate' when the result of the reftest(or manual test) is not 'PASS'. (#1009)

I'm very sorry for dropping PR1008 which James Graham also reviewed.
Thanks to James Graham. 
For my wrong git operation, I find the code of pull request1008 would be not update while I have modified trailing whitespace James suggested on my own branch. 
So I dropped PR1008 and repull new request. 

View on GitHub: https://github.com/w3c/web-platform-tests/pull/1009

Received on Friday, 23 May 2014 09:30:17 UTC