t: gws: ZMQConnection: new Python class
t: gws: ZMQConnection: new Python class

The ZMQConnection wraps receiving of ZMQ notifications from the BeeeOn
Server. This allows to better test certain operations on the server
because we can see how the server reacts.

Signed-off-by: Jan Viktorin <3eab6ac54c005c4408f608556a6663b7f2abede7@fit.vutbr.cz>

BeeeOn/server,BeeeOn/server,BeeeOn/server,BeeeOn/server