Handle SocketTimeout when villasnode is not running on startup

[stv0g]

In GitLab by @iripiri on Jan 21, 2022, 13:33

2022-01-21 10:47:31 | INFO | villas.controller | Connecting to: amqp://villas:test1234@villas-broker/'Reference to deleted milestone 2'F
2022-01-21 10:47:36 | WARNING | villas.controller.manager.villas-relay:621d57bb-757d-4fd7-9b09-e5efd39cc6f4 | Missing schemas!
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/site-packages/urllib3/connection.py", line 174, in _new_conn
    conn = connection.create_connection(
  File "/usr/local/lib/python3.9/site-packages/urllib3/util/connection.py", line 95, in create_connection
    raise err
  File "/usr/local/lib/python3.9/site-packages/urllib3/util/connection.py", line 85, in create_connection
    sock.connect(sa)
socket.timeout: timed out