fs/testing: fix golint warning
fs/testing: fix golint warning

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