[feature] when http request fails, implement some retry logic

[momu]

Sometimes the http request fails with status -2. In this case no http request is sent and no Divera alert is created. To prevent loosing alerts, the response code of a http request should be checked and if it is not 200 or 429 (to many request in the 5 minute interval) there should be some (definable) retries.

[15:26:06][D][binary_sensor:036]: 'DME Relais': Sending state ON
[15:26:06][I][main:1059]: Pager received a message
[15:26:06][I][main:008]: Sending Divera alert.        
[15:26:06][I][main:019]: Response status: -2, Duration: 3 ms
[15:26:07][W][http_request:087]: HTTP Request failed; URL: https://www.divera247.com/api/alarm?accesskey=<redacted>; Error: send header failed; Duration: 3 ms
[15:26:16][D][binary_sensor:036]: 'DME Relais': Sending state OFF
[15:26:37][D][binary_sensor:036]: 'DME Relais': Sending state ON
[15:26:37][I][main:1059]: Pager received a message
[15:26:38][I][main:008]: Sending Divera alert.
[15:26:40][I][main:019]: Response status: 200, Duration: 2093 ms
[15:26:40][D][http_request:099]: HTTP Request completed; URL: https://www.divera247.com/api/alarm?accesskey=<redacted>; Code: 200; Duration: 2093 ms
[15:26:40][W][component:214]: Component binary_sensor took a long time for an operation (2.12 s).
[15:26:40][W][component:215]: Components should block for at most 20-30ms.
[15:26:44][D][binary_sensor:036]: 'DME Relais': Sending state OFF

Testing

• change the api key
• issue a test alert
• http response should be 403
• check if the http request is retried N times