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/client/baseclient.py

@@ -203,7 +203,7 @@ class Client(object):
                 devport, baudrate=baudrate, timeout=1)
             self.connection.callbacks = []
         elif 'testing' not in opts:
-            host = opts.pop('connectto', 'localhost')
+            host = opts.pop('host', 'localhost')
             port = int(opts.pop('port', 10767))
             self.contactPoint = "tcp://%s:%d" % (host, port)
             self.connection = TCPConnection(host, port)