Add multichannel tests to smbtorture

[Jeremy Allison]

On Fri, Apr 19, 2019 at 02:05:06PM +0100, Sachin Prabhu via samba-technical wrote:
> Hello Jeremy,
> 
> Sorry about the delay. Getting the test environment up and running
> took longer than expected. The tests were run successfully against a
> Samba server with test multichannel patches and with a Microsoft
> Windows 2018 file server.
> I have attached the patch with the necessary changes suggested in the
> earlier email.

Looks great ! Pushed to master, thanks.

Jeremy.