provision/docker: create the container with the configured user
provision/docker: create the container with the configured user

Related to #874.

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