tags: move 'repo.tag' in the 'tags' module
Similar logic, pretty much nobody use this method (that creates a tag) so we
move it into the 'tags' module were it belong.
FROM centos:centos5
RUN yum install -y gcc make rpm-build gettext tar
RUN yum install -y python-devel python-docutils
# For creating repo meta data
RUN yum install -y createrepo
RUN yum install -y readline-devel openssl-devel ncurses-devel zlib-devel bzip2-devel