provision/docker/docker: add error in output and log it. Related to #1099
provision/docker/docker: add error in output and log it.
Related to #1099

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