Add template pipeline to split processed streams into two distinct streamAppenders for store

[burnalting]

Quite often we are presented with event sources where a portion of the information has limited time value whereas the rest has value for a reasonable time.

The typical use case for this is where a event source has events that only related to non person entities only (e.g. root on Linux, Administrator on Windows) and others to entities (i.e real users).

It is proposed we have a template pipeline that supports this concept such that, after an intial tranlsation, a 'split' is performed based on other translations (e.g. NPE users accepts on one side, no NPE users accepted on the other side of the split).

The pipleline would look like