errors: don't use unqualified imports for gocheck
errors: don't use unqualified imports for gocheck

That was easy :-)

Related to #330.

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