Tighten redfish check timeout

The default timeout is overkill in the nodediscover scenario.
Notably, we can receive replies from unreachable IP addresses,
and those will extend rescan to the full timeout.  The devices should
comfortably reply within 3 seconds, making scans exit in
a timely fashion.

confluent_server/confluent/discovery/protocols/ssdp.py

@@ -401,7 +401,7 @@ def check_fish(urldata, port=443, verifycallback=None):
         verifycallback = lambda x: True
     url, data = urldata
     try:
-        wc = webclient.SecureHTTPConnection(_get_svrip(data), port, verifycallback=verifycallback)
+        wc = webclient.SecureHTTPConnection(_get_svrip(data), port, verifycallback=verifycallback, timeout=3)
         peerinfo = wc.grab_json_response(url)
     except socket.error:
         return None