[DS-743] Fix out of memory exception with ItemImport

git-svn-id: http://scm.dspace.org/svn/repo/dspace/trunk@5749 9c30dcfa-912a-0410-8fc2-9e0234be79fd

dspace-api/src/main/java/org/dspace/app/itemimport/ItemImport.java

@@ -631,6 +631,7 @@ public class ItemImport
             {
                 addItem(c, mycollections, sourceDir, dircontents[i], mapOut, template);
                 System.out.println(i + " " + dircontents[i]);
+                c.clearCache();
             }
         }
     }
@@ -696,6 +697,7 @@ public class ItemImport
 
             deleteItem(c, oldItem);
             addItem(c, mycollections, sourceDir, newItemName, null, template);
+            c.clearCache();
         }
     }
 
@@ -726,6 +728,7 @@ public class ItemImport
                 System.out.println("Deleting item " + itemID);
                 deleteItem(c, myitem);
             }
+            c.clearCache();
         }
     }