registry loader does not employ the more flexible MetadataImporter
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                 Key: DS-1173
                 URL: https://jira.duraspace.org/browse/DS-1173
             Project: DSpace
          Issue Type: Improvement
          Components: DSpace API
    Affects Versions: 1.8.2
         Environment: All
            Reporter: Richard Jones


There is a registry loader command:

./dspace load-registry -dc [file path]

which loads dspace metadata registry format files into the registry.  There is 
a superior implementation of the metadata registry loader in 
org.dspace.administer.MetadataImporter, and the registry loader does not use 
this, but replicates old functionality which the MetadataImporter was written 
to replace.  The current registry loader, for example, dies if schema or 
metadata entries are repeated, while the MetadataImporter simply skips repeated 
options.

This is useful if you have a number of applications for your DSpace instance, 
and metadata schemas for each of these applications (e.g. theses management, 
research information data feeds, etc).  With the MetadataImporter you can 
maintain separate complete schemas for each application, load them all 
sequentially (on top of the default dspace registry), and be sure that your 
resulting registry is the super-set of all required metadata.  With the 
existing registry loader you must maintain exactly one de-duplicated schema 
which covers all possible uses, which is inconvenient.

The ideal thing to do would be to wire the registry loader into the 
MetadataImporter

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