Deal with the case when CREATE_SERVICE_WORKER_USERS is false.
Deal with the case when CREATE_SERVICE_WORKER_USERS is false.

In this case, `service_worker_users` still needs to be defined because the when condition is applied for each item in the `{{ service_worker_users }}` list.  So that var always has to resolve.
hastexo/edx-configuration,rue89-tech/configuration,EDUlib/configuration,EDUlib/configuration,Stanford-Online/configuration,arbrandes/edx-configuration,gsehub/configuration,stvstnfrd/configuration,edx/configuration,hks-epod/configuration,EDUlib/configuration,mitodl/configuration,edx/configuration,proversity-org/configuration,stvstnfrd/configuration,hastexo/edx-configuration,rue89-tech/configuration,Stanford-Online/configuration,edx/configuration,EDUlib/configuration,gsehub/configuration,arbrandes/edx-configuration,gsehub/configuration,rue89-tech/configuration,appsembler/configuration,hks-epod/configuration,rue89-tech/configuration,stvstnfrd/configuration,gsehub/configuration,hks-epod/configuration,EDUlib/configuration,hastexo/edx-configuration,stvstnfrd/configuration,gsehub/configuration,hastexo/edx-configuration,mitodl/configuration,appsembler/configuration,arbrandes/edx-configuration,proversity-org/configuration,hks-epod/configuration,proversity-org/configuration,Stanford-Online/configuration,proversity-org/configuration,hks-epod/configuration,mitodl/configuration,rue89-tech/configuration,hastexo/edx-configuration,arbrandes/edx-configuration,Stanford-Online/configuration,mitodl/configuration,stvstnfrd/configuration,appsembler/configuration,edx/configuration,proversity-org/configuration,Stanford-Online/configuration,appsembler/configuration,arbrandes/edx-configuration