replace call() with run(). Factorize run_command() and run_docker_stack_deploy(service, working_dir)

replace call() with run(). Factorize run_command() and run_docker_stack_deploy(service, working_dir)

Move constants to file constants.py. Change config root to dict and update parse_config(). Change some config parameters name (galaxy_persist_data, tripal_banner_path, jbrowse_menu_url), update example config file and compose templates. Remove apollo config variables (webapollo_user, webapollo_password) in config file and in gspecies compose template, because apollo service not deployed here. Factorize parse_input() et parse_config(). Update description of scripts in main. Set default config file in scripts. Remove useless variable datasets_to_get in gga_get_data.py. Update README.md.

Fix logging text. Keep species with best assembly in get_uniq_species_dict_list() (will be main jbrowse url).

Update compose files, authelia config. Fix banner. Write galaxy_nginx.conf only if needed. Modify authelia_config_path condition. Modify get config args. Remove deploy_stack_for_current_organism.instance_url

galaxy_nginx.conf jinja2 template writing, moved configuration files from 'templates' to 'files' for clarity