add test coverage for carbon recipe
add test coverage for carbon recipe

bitmonk/chef-graphite,mbabic/graphite,diegobill/graphite,hw-cookbooks/graphite,tas50/graphite,bitmonk/chef-graphite,bitmonk/chef-graphite,tas50/graphite,tas50/graphite,hw-cookbooks/graphite,diegobill/graphite,mbabic/graphite,hw-cookbooks/graphite,diegobill/graphite,mbabic/graphite