Migrations: Move Fedora changes to new migration

Fedora-related changes should not be in the released 0.4.0 migration,
but should be in their own.
Duracloud: Stub out Space

refs #7133

Add empty Space, form, constants etc.
Duracloud: Add fields

refs #7133

Add fields to Duracloud Space. Update places to match: constant, forms,
migration, fixtures, test.
Duracloud: Add helpers

refs #7133

Add session with auth for use with all the other functions and
constructor for duraspace URL.
Duracloud: Add move from SS

refs #7133
Duracloud: Add move to SS

refs #7133
Duracloud: Move to SS supports globbing

refs #7133
Duracloud: Add browse

refs #7133
Duracloud: Add delete

refs #7133