ARI high latency on POST channels/ring and POST channels/answer

@blkrckz28 I hope the asterisk guys will fix soon the problem.

When you perform a standard stasis call from a phone, the 200ms delay goes unnoticed, but when you have heavy load the problems start arising…
I’ve developed aricpp: a C++ library for ARI, and one of the first things that I tried was a test load with the help of sipp application: the latency was unacceptable and the calls started failing with a relatively low load…