In order to avoid hit the pull requests limit of docker.io, this changed the
openshift-ci/images/Dockerfile.buildroot dockerfile to pull the centos image
from registry.centos.org.
Fixes#1636
Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
This adds the dockerfile which is used by the OpenShift CI operator to build
the build root image. It is installed git as it is required by the operator
to clone repositories. The sudo package is also installed because many scripts
relies on the command but it is not installed by tests/.ci/setup_env_centos.sh.
Fixes#1636
Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
