api/service: add comments to describe service instance status
api/service: add comments to describe service instance status

tsuru/tsuru,gwmoura/tsuru,cezarsa/tsuru,guilhermebr/tsuru,ggarnier/tsuru,cezarsa/tsuru,guilhermebr/tsuru,ArxdSilva/tsuru,ArxdSilva/tsuru,guilhermebr/tsuru,tsuru/tsuru,guilhermebr/tsuru,tsuru/tsuru,ggarnier/tsuru,gwmoura/tsuru,cezarsa/tsuru,ArxdSilva/tsuru,ArxdSilva/tsuru,ggarnier/tsuru,tsuru/tsuru,cezarsa/tsuru,gwmoura/tsuru,ggarnier/tsuru