integration: add GCE cluster manager
integration: add GCE cluster manager

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