Error with auto_date parameter in configuration file
In the configuration file the following configuration leads to an error:
sensors_data_interpolation :
{
auto_date : False
}
Sentinel_2:
{
# start_date : '20180501'
# end_date : '20180601'
}
as the chosen dates will set to None
if not found in configuration file.
This should be check for each builder #436 and raise an error if detected. In case of multiple sensors, the constraint must be checked for each sensor.