pubs in Stash don't have paths and were losing their attachments on migration

have what we need for now)

an ROCrate object which will index properly - this is what was breaking in
Stash. Passing.

datacrate dependencies and terminology. Broken.

Added tests for the access rights messages when there are no attachments

eresearch/rdm#1142 - publish urls

DataCrates now include the data manager as a contactPoint - eresearch/rdm#1194
Deduplicated the list of people - ereasearch/rdm#1048

selected - passing