pidl/ws: fix failing tests

pidl/ws: fix failing tests

This commit fixes 2 test failures in Pidl test suite.

- commit 02cd7808 changed the error the test was expecting
  => update expected output in the test
- commit c76b65e changed whitespaces in the output
  => revert to the old output in the generator

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>