Script fails when rewrite isn't enabled on server #12
Description
webpagetest.org rewrites http://www.webpagetest.org/results.php?test=160321_KK_4eb6b407b53c44fa142d3188ca433841 to http://www.webpagetest.org/result/160321_KK_4eb6b407b53c44fa142d3188ca433841
If the rewrites aren't enabled on a private instance the script attempts to add a second query string.
https://github.com/andydavies/WPT-Bulk-Tester/blob/master/webpagetest.gs#L174 needs to check from presence of query string and f=json as "&f=json" instead