Email and Notification's false errors

[YassineCH96]

Currently, as an admin, we receive way too many false errors making detecting real problems with the charging stations much harder.

1. Many stations disconnect and reconnect instantly. this generates two notifications each time.
2. When a charging station just gets connected, the connector starts with a faulted status with "NoError" as an error message then directly changes to available. This also generates a false error.

I would like to suggest a delay between detecting and sending the messages.

1. If the station is still disconnected after 4 to 5 minutes then send the "Charging station is disconnected" email.
2. If the connector is still in error after 2 minutes then send the "connector x is in error" email.