- `openfin.init` allows to provide a disconnection handler
- this disconnection handler is stored on SSF side
- the openfin handler forward the disconnection event through a new `openfin-disconnection` event
- SSF calls the disconnection handler when a new `openfin-disconnection` event is received
Minor:
- in the openfin handler, a call to reset is now done before trying to connect to OpenFin
- removed the timeout log in the timeout promise, the log will be shown if the timeout promise rejects first (or in case of error)
