Fixed a unicode issue in certificate download
Fixed a unicode issue in certificate download

Edraak/edx-platform,Edraak/circleci-edx-platform,Edraak/edx-platform,Edraak/edx-platform,Edraak/circleci-edx-platform,Edraak/circleci-edx-platform,Edraak/circleci-edx-platform,Edraak/circleci-edx-platform,Edraak/edx-platform,Edraak/edx-platform