add was failing because not compliant with schema

tests/scripts/test023-refint

@@ -158,6 +158,7 @@ $LDAPADD -D "$REFINTDN" -h $LOCALHOST -p $PORT1 -w $PASSWD > \
 	$TESTOUT 2>&1 << ETEST
 dn: uid=special,ou=users,o=refint
 objectClass: inetOrgPerson
+objectClass: extensibleObject
 uid: special
 sn: special
 cn: special
@@ -171,6 +172,13 @@ givenName: special
 member: uid=alice,ou=users,o=refint
 ETEST
 
+RC=$?
+if test $RC != 0 ; then
+	echo "ldapadd failed ($RC)!"
+	test $KILLSERVERS != no && kill -HUP $KILLPIDS
+	exit $RC
+fi
+
 echo "Testing delete when referential attribute is a MUST..."
 $LDAPMODIFY -v -D "$REFINTDN" -h $LOCALHOST -p $PORT1 -w $PASSWD > \
 	$TESTOUT 2>&1 << EDEL