travis: uses travis_tag to version hub image
travis: uses travis_tag to version hub image

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