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>
(cherry picked from commit 6d6c4cc12c)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>

authorities/export.pl

@@ -20,7 +20,7 @@ my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
 my $op     = $query->param("op");
 my $format = $query->param("format");
 my $error  = '';
-if ( $op eq "cud-export" ) {
+if ( $op eq "export" ) {
     my $authid = $query->param("authid");
     if ($authid) {