Fix rom dataobj

[dylanjm]

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Pull Request Description

What issue does this change request address? (Use "#" before the issue to link it, i.e., #42.)

#731

What are the significant changes in functionality due to this change request?

Implements changes found in #1718

Allows the option to pass training data sets directly to ROM SupervisedLearning algorithms rather than converting everything to dictionaries.

A flag is used to allow the SVL to self-identify whether it needs legacy training (dictionaries) or can handle training via DataSet.

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For Change Control Board: Change Request Review

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