api/app: prevent test from runnin forever
api/app: prevent test from runnin forever

Go scheduler loses control when this test fail :) Using a ticker let's
it work.

cgvarela/tsuru,guilhermebr/tsuru,tsuru/tsuru,guilhermebr/tsuru,kgrvamsi/tsuru,hugoantunes/tsuru,Endika/tsuru,ggarnier/tsuru,tsuru/tsuru,ggarnier/tsuru,cgvarela/tsuru,ggarnier/tsuru,firebitsbr/tsuru,tuxmonteiro/tsuru,cezarsa/tsuru,mderaldo/tsuru,gwmoura/tsuru,hcxiong/tsuru,jblancett/tsuru,jblancett/tsuru,cezarsa/tsuru,cgvarela/tsuru,RichardKnop/tsuru,4eek/tsuru,firebitsbr/tsuru,Endika/tsuru,tsuru/tsuru,4eek/tsuru,gciotta/tsuru,ArxdSilva/tsuru,guilhermebr/tsuru,tsuru/tsuru,mderaldo/tsuru,hcxiong/tsuru,guilhermebr/tsuru,hugoantunes/tsuru,firebitsbr/tsuru,hcxiong/tsuru,kgrvamsi/tsuru,ggarnier/tsuru,cezarsa/tsuru,jblancett/tsuru,cezarsa/tsuru,RichardKnop/tsuru,RichardKnop/tsuru,Endika/tsuru,ArxdSilva/tsuru,gciotta/tsuru,ArxdSilva/tsuru,gwmoura/tsuru,kgrvamsi/tsuru,tuxmonteiro/tsuru,mderaldo/tsuru,tuxmonteiro/tsuru,ArxdSilva/tsuru,4eek/tsuru,gciotta/tsuru,gwmoura/tsuru