Add create_run; allow passing json to submit_job

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Rename ResultsPoster to ResultsReporter

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
s/submit_/report_/g

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Add create_run() and push_job_info() with docs.

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Add more documentation.

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Report results synchronously.

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>