[reSIProcate] conflict between dum Dialog and resip Dialog

[Fischl jason <jason.fischl@xxxxxxxxx>]

It turns out that there are two classes with the same name in the same
namespace called Dialog which was causing huge instabilities in dum
applications on Linux.

I've renamed the Dialog class in the resiprocate directory to be
DeprecatedDialog and fixed all of the uses inside of resip.

Jason