Add ruby packages for ticket 5379

inventory/group_vars/jenkins-slave

@@ -177,6 +177,21 @@ slave_packages_fedora:
 - python-mock
 - python-lxml
 - mongodb-server
+- ruby               # For modularity (ticket 5379)
+- ruby-devel
+- ruby-irb
+- ruby-libs
+- rubygem-bigdecimal
+- rubygem-bundler
+- rubygem-io-console
+- rubygem-json
+- rubygem-net-http-persistent
+- rubygem-psych
+- rubygem-rdoc
+- rubygem-rmagick
+- rubygem-thor
+- rubygems
+- rubypick
 
 # Packages installed only on CentOS Jenkins slaves
 slave_packages_centos: