api: require tsuru 0.17.1
api: require tsuru 0.17.1

We changed the JSON for units in app-list and app-info, so tsuru 0.17.0
won't work with tsurud 0.12.1.

cezarsa/tsuru,ggarnier/tsuru,cezarsa/tsuru,Endika/tsuru,gwmoura/tsuru,kgrvamsi/tsuru,guilhermebr/tsuru,tuxmonteiro/tsuru,guilhermebr/tsuru,ArxdSilva/tsuru,kgrvamsi/tsuru,gwmoura/tsuru,ArxdSilva/tsuru,tsuru/tsuru,Endika/tsuru,ggarnier/tsuru,ggarnier/tsuru,tsuru/tsuru,cezarsa/tsuru,hcxiong/tsuru,ArxdSilva/tsuru,guilhermebr/tsuru,hcxiong/tsuru,ArxdSilva/tsuru,tuxmonteiro/tsuru,guilhermebr/tsuru,tuxmonteiro/tsuru,cezarsa/tsuru,ggarnier/tsuru,gciotta/tsuru,Endika/tsuru,gciotta/tsuru,gciotta/tsuru,hcxiong/tsuru,tsuru/tsuru,kgrvamsi/tsuru,gwmoura/tsuru,tsuru/tsuru