Added mode overwrite to airplanes.json preperation in prepare_airplanes.py
Added mode overwrite to airplanes.json preperation in prepare_airplanes.py

rjurney/Agile_Data_Code_2,rjurney/Agile_Data_Code_2,rjurney/Agile_Data_Code_2,rjurney/Agile_Data_Code_2,naoyak/Agile_Data_Code_2,naoyak/Agile_Data_Code_2,naoyak/Agile_Data_Code_2,naoyak/Agile_Data_Code_2