(maint) Ignore ruby specific files when packaging module
(maint) Ignore ruby specific files when packaging module

Previously we were packaging the Rakefile & Gemfiles, however this is unnecessary.
tdevelioglu/puppetlabs-puppetdb,cristifalcas/puppetlabs-puppetdb,roman-mueller/puppetlabs-puppetdb,puppetlabs/puppetlabs-puppetdb,dealnews/puppetlabs-puppetdb,johnduarte/puppetlabs-puppetdb,redhat-cip/puppetlabs-puppetdb,mattiasgeniar/puppetlabs-puppetdb,Puppet-Finland/puppetlabs-puppetdb,nickchappell/puppetlabs-puppetdb,roman-mueller/puppetlabs-puppetdb,mullr/puppetlabs-puppetdb,kbarber/puppetlabs-puppetdb,simp/puppetlabs-puppetdb,ghoneycutt/puppetlabs-puppetdb,cristifalcas/puppetlabs-puppetdb,kbarber/puppetlabs-puppetdb,dealnews/puppetlabs-puppetdb,simp/puppetlabs-puppetdb,puppetlabs/puppetlabs-puppetdb,mullr/puppetlabs-puppetdb,nickchappell/puppetlabs-puppetdb,mattiasgeniar/puppetlabs-puppetdb,redhat-cip/puppetlabs-puppetdb,tdevelioglu/puppetlabs-puppetdb,Puppet-Finland/puppetlabs-puppetdb,ghoneycutt/puppetlabs-puppetdb,johnduarte/puppetlabs-puppetdb