added service_type attribute
added service_type attribute

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