Updated Tests to use Enums
Updated Tests to use Enums

Added Patient requirement and capitalized the various allergens to
match Swift enum styling.

masters3d/xswift,robtimp/xswift,exercism/xswift,masters3d/xswift,exercism/xswift,robtimp/xswift,robtimp/xswift,exercism/xswift,masters3d/xswift