Set python version for jenkins build tests.
Set python version for jenkins build tests.

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