Fix idrange unit test failure

This is a follow up to patch for ticket 4247 - the raised
errors.DependentEntry changed, test needs to be change as well.

https://fedorahosted.org/freeipa/ticket/4247

ipatests/test_xmlrpc/test_range_plugin.py

@@ -496,7 +496,7 @@ class test_range(Declarative):
             desc='Try to delete active AD trusted range %r' % testrange10,
             command=('idrange_del', [testrange10], {}),
             expected=errors.DependentEntry(
-                    label='Active Trust',
+                    label='Active Trust domain',
                     key=testrange10,
                     dependent=testtrust),
         ),