update crosswalk overrides

[lsat12357]

add od1 predicate for access_restrictions. possibly others?

[lsat12357]

we aren't quite ready for this, see OregonDigital/oregondigital#1306 and OregonDigital/OD2#959.
Rather than doing a rollback, I'm inclined to put the nil function in the overrides while this other work is completed.

[lsat12357]

captionTitle: http://opaquenamespace.org/ns/captionTitle
scribe: http://id.loc.gov/vocabulary/relators/scr
canzonierePoems: http://opaquenamespace.org/ns/canzonierePoems
earliestDate: http://opaquenamespace.org/ns/vra/earliestDate
latestDate: http://opaquenamespace.org/ns/vra/latestDate
rights_statement: http://purl.org/dc/elements/1.1/rights
dcRightsHolder: http://purl.org/dc/terms/rightsHolder
format: http://purl.org/dc/terms/format
extent: http://purl.org/dc/terms/extent
support: http://opaquenamespace.org/ns/vra/support
hostItem: http://opaquenamespace.org/ns/sheetmusic_hostItem
modified: http://purl.org/dc/terms/modified
tribalStatus: http://opaquenamespace.org/ns/tribalStatus
submissionDate: http://purl.org/dc/terms/dateSubmitted
numberOfPages: http://schema.org/numberOfPages
higherClassification: http://rs.tdwg.org/dwc/terms/higherClassification
preservation: http://www.loc.gov/premis/rdf/v1#hasOriginalName
hasFixity: http://www.loc.gov/premis/rdf/v1#hasFixity
imageWidth: http://www.w3.org/2003/12/exif/ns#width
imageHeight: http://www.w3.org/2003/12/exif/ns#height
imageOrientation: http://www.w3.org/2003/12/exif/ns#orientation
colorSpace: http://www.w3.org/2003/12/exif/ns#colorSpace
fileSize: http://www.rdaregistry.info/Elements/m/#fileSize.en

this is a list of od1 properties for which there is not a 1:1 property match on the OD2 map
and therefore they are not on the fields_map.yml

dcRightsHolder will get picked up on the crosswalk via its predicate
needs to be added to fields map!!

rights_statement has been remediated and is no longer used?

everything BUT dcRightsHolder on this list should have their predicates added
to the overrides with the NIL function
and the original od1 property name in the #comment
so they are documented but not migrated

[sseymore]

@lsat12357 we added the other OD1 rightsholder to the MAP to merge with OD2 rightsholder during migration.

[lsat12357]

pull dateDigitzed from fields, add predicate to the overrides with the null function
also see OregonDigital/OD2#1305