auth/oauth: fix test with updated oauth2 lib
auth/oauth: fix test with updated oauth2 lib

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