This basically modifies every source file in the repo.

* move all files from nl/dtls to org/fairdatateam

* replace all references to nl.dtls by org.fairdatateam

* replace groupId nl.dtls by org.fairdatateam in pom.xml (note that the develop branch uses org.fairdatapoint, but that is inconsistent with the rest of our packages, so we need to fix the groupId for develop as well...)

* bump version to 1.19.1, because the change is only internal and there is no change in functionality (fdp is not a library, and it is not published in any package repo, so there should not be any dependent projects)

* change license owner from DTL to FAIR Data Team in pom.xml

* replace DTL by FAIR Data Team in license text for *all* files

* replace dtls in path in mongo migration readme

this is much more convenient for the user, not having to scroll through the many options

* hide user details in mapping from SearchSavedQuery to SearchSavedQueryDTO (for backward compatibility, the structure of the returned json object remains unchanged, but the values are now anonymized)

* adapt SearchSavedQueryService methods to new signature for SearchSavedQueryMapper.toDTO()

* update security.md

todo: for the next major release, we should simply replace the user object by the user's uuid string