Update discovery node version.
Update discovery node version.

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