QtIFW

Move and rename connect method, adapt depending code.

Move the connect into the remote object class and rename. Avoids
passing around the socket and possible writing to the socket in
a different thread. Also inherit the private remote client class
from remote object to avoid code duplication (connect and send).

Change-Id: I6e747dbbd8eff2846362d7f5fa4fa170495ac503
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>