add data_dir to bok_choy test settings
add data_dir to bok_choy test settings

openfun/edx-platform,Edraak/circleci-edx-platform,edx-solutions/edx-platform,marcore/edx-platform,gymnasium/edx-platform,knehez/edx-platform,Edraak/edx-platform,appsembler/edx-platform,openfun/edx-platform,openfun/edx-platform,edx-solutions/edx-platform,cecep-edu/edx-platform,edx-solutions/edx-platform,Edraak/edx-platform,marcore/edx-platform,Edraak/edx-platform,knehez/edx-platform,chand3040/cloud_that,openfun/edx-platform,Edraak/circleci-edx-platform,appsembler/edx-platform,chand3040/cloud_that,knehez/edx-platform,gymnasium/edx-platform,Edraak/edx-platform,chand3040/cloud_that,gymnasium/edx-platform,knehez/edx-platform,cecep-edu/edx-platform,cecep-edu/edx-platform,cecep-edu/edx-platform,gymnasium/edx-platform,chand3040/cloud_that,edx-solutions/edx-platform,chand3040/cloud_that,appsembler/edx-platform,cecep-edu/edx-platform,marcore/edx-platform,openfun/edx-platform,appsembler/edx-platform,Edraak/edx-platform,Edraak/circleci-edx-platform,Edraak/circleci-edx-platform,knehez/edx-platform,Edraak/circleci-edx-platform,marcore/edx-platform