message: Fix CI centos6 package failures
diff: @@ -10,6 +10,7 @@ RUN touch /var/lib/rpm/* \
  && yum -y install \
  epel-release \
  centos-release-scl-rh \
  + yum-utils \
  && yum-config-manager --enable rhel-server-rhscl-6-rpms \
  && curl -s $PACKAGECLOUD_URL/script.rpm.sh | bash \
  && yum clean all
  