RM-2529 Add classified aspect as system rather than the user "admin".

This change causes ClassifyTest.testClassifyFrozenRecord() to fail. The
test is accurately reflecting a bug in the server that this change reveals
(or introduces).  See RM-2530.

+review RM

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/modules/recordsmanagement/HEAD@110137 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/classification/ContentClassificationServiceImpl.java

@@ -102,14 +102,14 @@ public class ContentClassificationServiceImpl extends ServiceBaseImpl
         final Map<QName, Serializable> properties = createPropertiesMap(classificationAspectProperties, content);
 
         // Add aspect
-        authenticationUtil.runAs(new RunAsWork<Void>()
+        authenticationUtil.runAsSystem(new RunAsWork<Void>()
         {
             public Void doWork()
             {
                 nodeService.addAspect(content, ASPECT_CLASSIFIED, properties);
                 return null;
             }
-        }, authenticationUtil.getAdminUserName());
+        });
     }
 
     /**