rename host argument to client

from connectto to host

Change-Id: I4835148b9b7e4675ba70e588998eadc0889735c2
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/21289
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>
Tested-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>

secop/gui/mainwindow.py

@@ -150,7 +150,7 @@ class MainWindow(QMainWindow):
         if ':' in host:
             host, port = host.split(':', 1)
             port = int(port)
-        node = QSECNode({'connectto': host, 'port': port}, parent=self)
+        node = QSECNode({'host': host, 'port': port}, parent=self)
         host = '%s:%d' % (host, port)
 
         host = '%s (%s)' % (node.equipmentId, host)