Adjust classification mapping logic

[SamiNorling]

Per the standard list of vocabulary terms to me used in LA, there are established categories of artworks and other Human-Made_Objects that are recommended for use.

Current IMA mapping assigns classifications of "artwork" for all records + IMA thesaurus terms based on PhyMediaCategory_tab. This is incorrect. Only artworks should be considered artworks (e.g., design collection and similar artifacts should not receive this type.

Solution: use TitObjectType for major categories (e.g., "Visual Works: Paintings"). Where there is not a clear mapping to our Record Types, a broad AAT category won't be available, just the IMA thesaurus term.

[SamiNorling]

EMu Record Type values:

- Architectural Elements
- Art Object
- Built Environment
- Components
- Containers
- Costume
- Costume Accessories
- Default
- Educational Resources
- Equipment
- Exchange Media
- Fragment
- Frames
- Furnishings
- Furnishings and Equipment
- Information Forms
- Measuring Devices
- Recreational Artifacts
- Recreational Equipment
- Sound Devices
- Tools and Equipment
- Transportation Vehicles
- Visual Works: Drawings
- Visual Works: Multimedia
- Visual Works: Needlework
- Visual Works: Paintings
- Visual Works: Pastels
- Visual Works: Performance
- Visual Works: Photographs
- Visual Works: Prints
- Visual Works: Sculpture
- Weapons and Ammunition

See Record Types note document for AAT term mappings.