New internal data structure allows to batch together traces from different resources. This simplify batching a lot. This commit removes most of the functionality for handling many batches per node and uses only one batch with one ticker.
Initial updates to migrate processor metrics to obsreport package, ie.: the new metrics.
Cleaned-up a bit some of the processor metrics and spelled out the rule names for new metrics.
Related to https://github.com/open-telemetry/opentelemetry-collector/issues/141
Testing: Added test for the processor common metrics, validated manually that legacy metrics were still working
For historical reasons the tag associated to the name of a processor was still named "exporter", changed that to "processor". Added also the name of the queued retry instance to be used as the name of the processor.
Pavol Loffay
Bruno Garcia
Bogdan Drutu
Dmitrii Anoshin
Paulo Janotti
Paulo Janotti
Steve Flanders