Remove metric options; rename "counter" aggregator to "sum"#541

Merged

jmacd merged 5 commits intoopen-telemetry:masterfrom jmacd:jmacd/remove_metric_options

Mar 12, 2020

+364-861

Commits on Mar 11, 2020

Remove options (mostly)
jmacd
committed
Rename counter aggregator to 'sum'
jmacd
committed
Fix prometheus test
jmacd
committed
Upstream merge
jmacd
committed

Commits on Mar 12, 2020

Rewordings from feedback
jmacd
committed