Multi-Instance Task: Parallel Execution Issue with Data Store Inputs

[usama9500]

Multi-instance tasks, designed to execute in parallel, are instead running sequentially when pulling input data from a data store.

[essweine]

This is a duplicate of a documentation ticket in spiff-arena sartography/spiff-arena#1572.

Note that this is not an accurate description of the problem, which was that one of our users had to use a sequential multiinstance instead of a parallel multiinstance to get the model working.