make gsh easier to use by having subjectId calls (like grantPriv), use SubjectFinder.findByIdOrIdentifier

to make gsh easier to use, make subjectId calls like grantPriv, use SubjectFinder.findByIdOrIdentifier.

This will be backwards compatible, since if it finds one by id, it will use it. If not, it will search by identifier. This will find groups by their name and not their uuid...