[jenkins_build] Add the pipeline-utility-steps plugin
[jenkins_build] Add the pipeline-utility-steps plugin

The primary motivation is that this provides convenience functions for
parsing YAML files.

rue89-tech/configuration,appsembler/configuration,edx/configuration,hks-epod/configuration,EDUlib/configuration,rue89-tech/configuration,gsehub/configuration,arbrandes/edx-configuration,Stanford-Online/configuration,mitodl/configuration,mitodl/configuration,edx/configuration,Stanford-Online/configuration,gsehub/configuration,arbrandes/edx-configuration,gsehub/configuration,gsehub/configuration,edx/configuration,hks-epod/configuration,hks-epod/configuration,arbrandes/edx-configuration,mitodl/configuration,arbrandes/edx-configuration,Stanford-Online/configuration,stvstnfrd/configuration,hks-epod/configuration,rue89-tech/configuration,EDUlib/configuration,rue89-tech/configuration,appsembler/configuration,EDUlib/configuration,Stanford-Online/configuration,rue89-tech/configuration,stvstnfrd/configuration,mitodl/configuration,Stanford-Online/configuration,gsehub/configuration,arbrandes/edx-configuration,EDUlib/configuration,EDUlib/configuration,appsembler/configuration,stvstnfrd/configuration,hks-epod/configuration,stvstnfrd/configuration,appsembler/configuration,stvstnfrd/configuration,edx/configuration