[SoaS] Collaboration failure with Fedora rawhide & Sugar 0.116

[Alex Perez]

Ibiam,

When you set the collaboration server to jabber.sugarlabs.org in the 
Network Control Panel within Sugar, it fails to connect to the server, 
with a Python error of "TypeError: Object of type DBusException is not 
JSON serializable"

Full sugar log output at https://termbin.com/z6g0