Add missing properties file fields to import

ImportJournal2Authority was missing several fields that are used in the
DryadJournalSubmission.properties file:

- allowReviewWorkflow
- embargoAllowed
- notifyWeekly
- sponsorName

Among other things, this causes the list of review journals to be
empty, and would prevent embargoes and sponsored payments from working
Correct getMetadata calls to use null as qualifier

When concepts are created, the metadata fields use null as the
qualifier, but JournalUtils was trying to fetch them with an empty
string “” as the qualifier - this results in the data not being read.