Update SIPml5 library with the 2.1.3a version
- SIPml5 is a patched version, see https://gitlab.com/xivo.solutions/sipml5
- it resolves the #685, the Asterisk WebRTC compatibility with Chrome v57
Closes #685
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Closes #685