Review schema for biblio core

[todolson]

Our schema.xml for the biblio core is out of step with the main VuFind 3.1 schema. This needs to be reviewed and brought back into order:

• [ ] schema.xml, start from from master branch
• [ ] marc.properties should start with master branch
• [ ] marc_local.properties for local changes
• [ ] marc_ole.properties for OLE-specific local changes
• [ ] confirm import_ole.properties and import_ole_syn.properties refer to all needed marc*.properties files
• [ ] searchspecs.yaml will need to reflect new field names. Start with master branch and compare fields and weights with the current production

This needs to be a comprehensive review. It will change the schema, so will need to coordinate with the developers.

[seanfilipov]

Fields were rearranged to better reflect original schema file. Commits: 512bdf4bf fa4c2a696