Bug 37235: Fix export of single authority record

Bug 37235: Fix export of single authority record

When viewing an authority record, you have the option to "Save" in
several different formats. This operation is a GET operation and the
script should not be looking for a "cud-" operation.

To test you should have at least one authority record.

- Apply the patch and go to Authorities.
- Perform an authority search which will return one or more records.
- View the details of an authority record.
- From the toolbar, test the "Save" option*

* Note: In my test the export choice "MADS (XML)" resulted in a
  zero-byte file but I'm assuming that is a separate issue.

Sponsored-by: Athens County Public Libraries
Signed-off-by: Caroline Cyr La Rose <caroline.cyr-la-rose@inlibro.com>
Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>