pidl/ws: Remove pinfo->private_data from DCERPC dissectors.

pidl/ws: Remove pinfo->private_data from DCERPC dissectors.

Sort of re-apply Wireshark commit 79cd356 which was never sync with
samba. It was reverted then reintroduced in the WS repo (yes this is
quite convulted).

Original commit message:

Author: Michael Mann <mmann78@netscape.net>
Date:   Wed Nov 6 12:36:09 2013 +0000

    Remove pinfo->private_data from DCERPC dissectors.  Bug 9387 (https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=9387)

    This is the PIDL input file changes necessary to support removing pinfo->private_data from the DCERPC dissectors in favor of passing it through function parameters.  I didn't regenerate the dissector source, so this is just a "good faith" effort to mimic the manual changes.

    svn path=/trunk/; revision=53098

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