Json reports name issue

[Balajiiguru]

Hi Ram,
The json report get generated based on the option json:./reports/json/cucumber_report.json in Cucumber opts section result in json file gernated like cucumber_report1234.json(some additional number in the file name),so HTML report genrateion get failed as the Traget json name mismatch.

[ibenjelloun]

When running test on a hub, multiple threads will run the tests on multiple browsers. The json report files would be generate in parallel and have different names (tagged with the pid).