RemoteLinux: More preparations for introducing an abstract device class.

- Introduce clone() method.
- Rename "osType" to "type" and "deviceType" to "machineType".
- Move machine type display out of generic settings widget.
- Put only immutable attributes into the device constructor and set the
others via setters. As part of this, also give the
SshConnectionParameters a default proxy type. The necessity to give one
to the constructor explicitly was for historical reasons.

Change-Id: I84757b1b2d6371544b9ab1f3290973e5498176ce
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

src/plugins/debugger/debuggerstartparameters.h

@@ -65,7 +65,6 @@ public:
         qmlServerAddress(QLatin1String("127.0.0.1")),
         qmlServerPort(ProjectExplorer::Constants::QML_DEFAULT_DEBUG_SERVER_PORT),
         useServerStartScript(false),
-        connParams(Utils::SshConnectionParameters::NoProxy),
         requestRemoteSetup(false),
         startMode(NoStartMode),
         executableUid(0),