Added a new test method testDeleteDocumentByGUID() to ensure MetacatHandler can delete based on GUID, but fall back to docid if the GUID isn't present. Modified CrudServiceTest and made some private methods public to leverage the D1 REST calls in that library (i.e. create() a doc with a GUID).
Added a new test method testDeleteDocumentByGUID() to ensure MetacatHandler can delete based on GUID, but fall back to docid if the GUID isn't present. Modified CrudServiceTest and made some private methods public to leverage the D1 REST calls in that library (i.e. create() a doc with a GUID).