Error message when connect fails

[IssaHanou]

Content

When device is unable to connect to a broker, it gives an ugly error. This should be fixed.

Error

2019-12-19 10:10:31,900 [INFO ]  Start of log for device: display
Traceback (most recent call last):
  File "D:/GitHub/BEP_1920_Q2/cc_library/src/scripts/display.py", line 47, in <module>
    device.main()
  File "D:/GitHub/BEP_1920_Q2/cc_library/src/scripts/display.py", line 42, in main
    self.start()
  File "D:\GitHub\BEP_1920_Q2\cc_library\src\sciler\scclib\device.py", line 54, in start
    self.scclib.start(loop, stop)
  File "D:\GitHub\BEP_1920_Q2\cc_library\src\sciler\scclib\app.py", line 65, in start
    self.__connect()
  File "D:\GitHub\BEP_1920_Q2\cc_library\src\sciler\scclib\app.py", line 112, in __connect
    self.client.connect(self.host, self.port, keepalive=10)
  File "C:\Users\issah\AppData\Local\Programs\Python\Python37-32\lib\site-packages\paho\mqtt\client.py", line 937, in connect
    return self.reconnect()
  File "C:\Users\issah\AppData\Local\Programs\Python\Python37-32\lib\site-packages\paho\mqtt\client.py", line 1071, in reconnect
    sock = self._create_socket_connection()
  File "C:\Users\issah\AppData\Local\Programs\Python\Python37-32\lib\site-packages\paho\mqtt\client.py", line 3522, in _create_socket_connection
    return socket.create_connection(addr, source_address=source, timeout=self._keepalive)
  File "C:\Users\issah\AppData\Local\Programs\Python\Python37-32\lib\socket.py", line 727, in create_connection
    raise err
  File "C:\Users\issah\AppData\Local\Programs\Python\Python37-32\lib\socket.py", line 716, in create_connection
    sock.connect(sa)
socket.timeout: timed out

Process finished with exit code 1