Don't wait too much to connect.

Some AVDs down't allow to connect to their console,
there is no point to wait 30s (which is the default connection timeout).

Change-Id: I3cb82b99f958787215f44b471abfc203d7633089
Reviewed-by: Vikas Pachdha <vikas.pachdha@theqtcompany.com>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>