Fix bug automatic datapipe configuration

[ehennestad]

Motivation

This change fixes a failing test in PR #716.

In summary:
When applying a dataset configuration (PR #636), the DataPipe's maxSize was previously set automatically in the DataPipe constructor. Using that default behavior, vectors were mapped onto 2D datasets in file, because the maxSize was set to [Inf, n], respecting the 2D nature of MATLAB vectors. This change forces a vector to 1D by explicitly setting maxSize to [Inf] when creating a DataPipe for column- and row-vectors.

How to test the behavior?

Show here how to reproduce the new behavior (can be a bug fix or a new feature)

Checklist

• Have you ensured the PR description clearly describes the problem and solutions?
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• If this PR fixes an issue, is the first line of the PR description fix #XX where XX is the issue number?