Install the infrastructure stg repo

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>

dev/containers/centos7-rpms-py2

@@ -4,6 +4,7 @@ RUN yum -y install \
     epel-release
 
 ADD ./fedora-infra-tags.repo /etc/yum.repos.d/infra-tags.repo
+ADD ./fedora-infra-tags-stg.repo /etc/yum.repos.d/infra-tags-stg.repo
 
 RUN yum -y install \
     yum-utils \

dev/containers/fedora-infra-tags-stg.repo

@@ -0,0 +1,6 @@
+[infrastructure-tags-stg]
+name=Fedora Infrastructure tag $releasever - $basearch
+baseurl=https://kojipkgs.fedoraproject.org/repos-dist/epel$releasever-infra-stg/latest/$basearch/
+enabled=1
+gpgcheck=1
+gpgkey=https://infrastructure.fedoraproject.org/repo/infra/RPM-GPG-KEY-INFRA-TAGS