Change the ingest byte stats to always be returned
whether or not they have a value of 0. Add human readable
form of byte stats. Update docs to reflect changes.
Current ingest byte stat fields could easily be confused.
Add more descriptive name to make it clear that they do not
count all docs processed by the pipeline.
Add ingested_in_bytes and produced_in_bytes stats to pipeline ingest stats.
These track how many bytes are ingested and produced by a given pipeline.
For efficiency, these stats are recorded for the first pipeline to process a
document. Thus, if a pipeline is called as a final pipeline after a default pipeline,
as a pipeline processor, and after a reroute request, a document will not
contribute to the stats for that pipeline. If a given pipeline has 0 bytes recorded
for both of these stats, due to not being the first pipeline to run any doc, these
stats will not appear in the pipeline's entry in ingest stats.
Add a new target (`script`) to the `/_info` API. It consolidates all the script information from the cluster nodes and returns a summary at the cluster level (compared with `_nodes/stats/script` it lacks the `<node>` dimension).
Add a new target (thread_pool) to the /_info API. It consolidates all the thread pools information from the cluster nodes and returns a summary at the cluster level (compared with _nodes/stats/thread_pool it lacks the <node> dimension)
