New Feature - Pass coloring strategy via command line for he_prep

[christopherngutierrez]

Proposed changes

Enables he_prep to receive command line argument for graph coloring strategy. Defaults to previous defaults for coloring.

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (if none of the other choices apply)

Checklist

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• Any dependent changes have been merged and published in downstream modules

Further comments

[kylanerace]

LGTM

[kylanerace]

LGTM, used personally

[joserochh]

LGTM. Unused verbose parameter removed.

[kylanerace]

LGTM, minor fix