Added celery time zone variable
Added celery time zone variable

EDUlib/configuration,mitodl/configuration,arbrandes/edx-configuration,edx/configuration,stvstnfrd/configuration,edx/configuration,edx/configuration,arbrandes/edx-configuration,stvstnfrd/configuration,appsembler/configuration,EDUlib/configuration,mitodl/configuration,EDUlib/configuration,stvstnfrd/configuration,stvstnfrd/configuration,arbrandes/edx-configuration,mitodl/configuration,arbrandes/edx-configuration,mitodl/configuration,edx/configuration,appsembler/configuration,EDUlib/configuration,appsembler/configuration,EDUlib/configuration,stvstnfrd/configuration,arbrandes/edx-configuration,appsembler/configuration