Show 'complexity password' error instead of a generic error.

There is not discrimination between complexity and length errors because backend does not
return different error codes for each case.

SoObjects/SOGo/LDAPSource.m

@@ -737,7 +737,14 @@ groupObjectClasses: (NSArray *) newGroupObjectClasses
       }
   NS_HANDLER
     {
-      [self logWithFormat: @"%@", localException];
+      if ([[localException name] isEqual: @"LDAPException"] && ([[[localException userInfo] objectForKey: @"error_code"] intValue] == LDAP_CONSTRAINT_VIOLATION))
+        {
+          *perr = PolicyInsufficientPasswordQuality;
+        }
+      else
+        {
+          [self logWithFormat: @"%@", localException];
+        }
     }
   NS_ENDHANDLER ;