Dublicate Calls on Linux

Issue generated from Tuleap's migration script. Originally submitted by: Alexandr Sergheev (asergheev)

It is possible to create dublicate calls on Ubuntu

steps:

1Call to RingID\_1 , establish connection

2 double click to RingID\_1

3 Right click to RingID\_1 choose Call

Result: Three connectivity session created

Ring should switch to existing session every time when user atempt to create new call with the same recipient