Default Locations: Add exception handling
Default Locations: Add exception handling

refs #7416

Add try-except blocks around Space and Location creation so that defaults
creation does not block interacting with the storage service if there are
problems.  Restructure Location creation to reduce boilerplate.

artefactual/archivematica-storage-service,artefactual/archivematica-storage-service,artefactual/archivematica-storage-service,artefactual/archivematica-storage-service