VIVO-662 Remove duplicate rows from the SPARQL query results.

Two rows are considered to be duplicates if they have the same authorshipURI or the same authorURI.

src/edu/cornell/mannlib/vitro/webapp/edit/n3editing/configuration/generators/AddAuthorsToInformationResourceGenerator.java

@@ -378,6 +378,7 @@ public class AddAuthorsToInformationResourceGenerator extends VivoBaseGenerator
         } catch (Exception e) {
             log.error(e, e);
         }    
+        authorships = QueryUtils.removeDuplicatesMapsFromList(authorships, "authorShipURI", "authorURI");
         log.debug("authorships = " + authorships);
         return getAuthorshipInfo(authorships);
     }