task csv-to-oscal-cd should allow for comment columns

[degenaro]

Issue description / feature objectives

Presently, the task csv-to-ocsal cd attempts to include all unadorned columns as properties in the transformation from csv to OSCAL json.

A new feature: when the column name starts with a # the column should be ignored; that is the column data will not be included in the produced json. This will facilitate inclusion of data that is desired in the csv but is not desired in the resulting json.

Caveats / Assumptions

The reverse process from comp-def to csv, should it ever come into existence, would not be able to reconstitute the original csv in its entirety, since the data in the # column will not be present.

Completion Criteria

Help and test cases updated.

[degenaro]

Fixed by #1459