Add pass/fail SauceLabs test status when reporting results

[kgress]

Summary

In order for test results to appear as a pass/fail in Sauce, we need to implement the update_job method in the Sauce Labs REST API, as seen here.

A/C

• Scaffold should report a pass or a fail to the sauce labs API
• If a test cannot complete or stalls, we should report that as neither a pass or fail