Confirm system desc format

[petermattson]

https://github.com/mlperf/policies/blob/master/submission_rules.adoc#system_desc_id-json-metadata

Is correct. Some 0.6 sys descs differed.

Best,
Peter

[bitfort]

Thank you for reminding everyone. Clarified for the group to follow this format, no objections noted.

AI(Everyone) to read this.

[christ1ne]

Can we share the most updated json template on the GitHub so that there is no surprises on the json structure? @bitfort @petermattson