Merged 5.2.0 (5.2.0) to HEAD (5.2)

132998 mward: Merged mward/5.2.n-repo1544-update-self (5.2.1) to 5.2.N (5.2.1)
      132959 mward: REPO-1544: added error message (review: CR-620)


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@133375 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/rest/api/impl/PeopleImpl.java

@@ -542,7 +542,7 @@ public class PeopleImpl implements People
                 // Non-admin users can update their own password, but must provide their current password.
                 if (person.getOldPassword() == null)
                 {
-                    throw new PermissionDeniedException();
+                    throw new PermissionDeniedException("Existing password is required, but missing (filed 'oldPassword').");
                 }
                 char[] oldPassword = person.getOldPassword().toCharArray();
                 try