Add acceptance tests about user presential

Why is this task blocked ?

We have a bug/weird behavior when holding/unhold on linphone

Maybe this ticket should be moved to TODO or another ticket to fix the hold command for linphone should be created. I was only tired to work on acceptance

Can you give more information about the bug you mention?

The holding command from linphone doesn’t work. If I remember well, it hangup the call (but not sure)

I don’t investigate it, because if I had more information I will fix it