Ignore intermittent http connection errors to OpenMHz

[mpuckett159]

Just need to ignore this because sometimes OpenMHz fails to respond to a new request or just goes offline, but should ignore because it's fine.

Error message:
BOT FAILURE: HTTPSConnectionPool(host='api.openmhz.com', port=443): Max retries exceeded with url: /kcers1b/calls/newer?filter-type=group&filter-code=5ee350e04983d0002586456f&time=1634780775633 (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7fc8e86d2490>: Failed to establish a new connection: [Errno 111] Connection refused'))
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/urllib3/connection.py", line 169, in _new_conn
conn = connection.create_connection(
File "/usr/local/lib/python3.8/site-packages/urllib3/util/connection.py", line 96, in create_connection
raise err
File "/usr/local/lib/python3.8/site-packages/urllib3/util/connection.py", line 86, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py", line 699, in urlopen
httplib_response = self._make_request(
File "/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py", line 382, in _make_request
self._validate_conn(conn)
File "/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py", line 1010, in _validate_conn
conn.connect()
File "/usr/local/lib/python3.8/site-packages/urllib3/connection.py", line 353, in connect
conn = self._new_conn()
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x7fc8e86d2490>: Failed to establish a new connection: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/requests/adapters.py", line 439, in send
resp = conn.urlopen(
File "/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py", line 755, in urlopen
retries = retries.increment(
File "/usr/local/lib/python3.8/site-packages/urllib3/util/retry.py", line 574, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='api.openmhz.com', port=443): Max retries exceeded with url: /kcers1b/calls/newer?filter-type=group&filter-code=5ee350e04983d0002586456f&time=1634780775633 (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7fc8e86d2490>: Failed to establish a new connection: [Errno 111] Connection refused'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/app/signal_scanner_bot/transport.py", line 148, in radio_monitor_alert_transport
if radio_monitor_alert_messages := radio_monitor_alert.check_radio_calls():
File "/app/signal_scanner_bot/radio_monitor_alert.py", line 79, in check_radio_calls
calls = get_openmhz_calls()
File "/app/signal_scanner_bot/radio_monitor_alert.py", line 38, in get_openmhz_calls
response = requests.get(env.OPENMHZ_URL, params={"time": lookback_time})
File "/usr/local/lib/python3.8/site-packages/requests/api.py", line 75, in get
return request('get', url, params=params, **kwargs)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='api.openmhz.com', port=443): Max retries exceeded with url: /kcers1b/calls/newer?filter-type=group&filter-code=5ee350e04983d0002586456f&time=1634780775633 (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7fc8e86d2490>: Failed to establish a new connection: [Errno 111] Connection refused'))