Fix hh interpolation

hydesign/examples/Europe/2030-EL_PRICE.csv

hydesign/examples/Europe/hpp_pars.yml

hydesign/examples/Europe/input_ts_Denmark_good_solar.csv

hydesign/examples/Europe/input_ts_Denmark_good_wind.csv

...sign/examples/Europe/input_ts_France_bad_solar_n_wind.csv

hydesign/examples/Europe/input_ts_France_good_solar.csv

hydesign/examples/Europe/input_ts_France_good_wind.csv

...ign/examples/Europe/input_ts_Germany_bad_solar_n_wind.csv

hydesign/examples/Europe/input_ts_Germany_good_wind.csv

hydesign/examples/India/hpp_pars.yml

...xamples/India/input_ts_Indian_site_bad_solar_bad_wind.csv

hydesign/examples/India/input_ts_Indian_site_good_solar.csv

hydesign/examples/India/input_ts_Indian_site_good_wind.csv

...le_sites_data_extraction/Handle_raw_Balmorel_prices.ipynb

...es_data_extraction/hydesign_extract_example_sites_data.py

...es_data_extraction/hydesign_extract_example_sites_data.sh

..._sites_data_extraction/output_hydesign_simple_1955023.log

hydesign/hpp_assembly.py

hydesign/tests/test_evaluation.py

hydesign/tests/test_files/France_good_wind_design.csv