A flag for making AnalyzerBeans concurrent also at a step/component level

[kaspersorensen]

A tweak for jobs with "heavy" components and low-record count...

Right now we are concurrent on a record-by-record level. This is great for most batch jobs since it does a good job at automatically spreading the load evenly on processors and avoids bottlenecks etc.

But say you have just one record which needs to do a couple of (independent) steps. For instance, it might be calling 3 different web services (transformers), without any particular dependency/chaining inbetween. Then the 3 transformers should be invoked in parallel and thereby the overhead of waiting for the previous step to finish be gone.