Support for legacy code defaults

[jkirk5]

Summary

Reworked fortran_to_aviary to support default values and units that are separate from variable metadata

• An incomplete list of defaults for each legacy code are provided in python files in NamedValues format
• When converting an input file, all defaults are added to that file, to prevent a changed Aviary default from overwriting the expected default in the legacy code. Any values provided by the user in the input file overwrite defaults in the converted Aviary .csv
• Fixed bug where variables in the "depreciated" list weren't being properly excluded from the "Unconverted Values" section
• Removed support for mixed FLOPS/GASP/Aviary files. Only "valid" input files that are able to be successfully run using a legacy tool will be supported going forward
• Verbosity utility runs at is no longer tied to verbosity specified for the model itself

Fixed a bug where fortran_to_aviary tests were not actually testing anything

• Made new copies of expected .csv under utils/tests/data because files under models are modified with additional variables added after conversion

Moved some files that seem to only be used for converter tests (including engine deck conversion) into the utils/test/data directory

Renamed some example models to be more consistently named for better clarity

Related Issues

• Designed to support Make reasonable defaults throughout Aviary #291

Backwards incompatibilities

None

New Dependencies

None