Update Centos Dockerfile to use Go 1.7
Update Centos Dockerfile to use Go 1.7

lululau/fzf,qiemem/fzf,janlazo/fzf,janlazo/fzf,tomfitzhenry/pkg-fzf,junegunn/fzf,stuha/wbr-zsh,wilywampa/fzf,infokiller/fzf,qiemem/fzf,junegunn/fzf,lululau/fzf,janlazo/fzf,tomfitzhenry/pkg-fzf,wilywampa/fzf,infokiller/fzf,junegunn/fzf,wilywampa/fzf,tomfitzhenry/pkg-fzf,infokiller/fzf,lululau/fzf,qiemem/fzf