updated the requirements to use latest version of edx-submissions
updated the requirements to use latest version of edx-submissions

EDUlib/edx-ora2,edx/edx-ora2,edx/edx-ora2,EDUlib/edx-ora2,edx/edx-ora2,EDUlib/edx-ora2,edx/edx-ora2,EDUlib/edx-ora2