fix(build): disable metalink for epel
Seems that the mirror selected by metalink in most cases ends up
returning `503 Service Unavailable` this disables metalink for the EPEL
repository making the build more robust.
Ref
@@ -16,6 +16,7 @@ ENV KUBECONFIG=/opt/kube-config \
RUN yum clean all \
&& yum update -y \
&& yum install -y "epel-release" \
+ && sed -i -e 's/#baseurl/baseurl/g' -e 's/metalink/#metalink/g' /etc/yum.repos.d/epel.repo \
&& yum install -y "$openshift_yum_repo" \
&& yum install -y \
"$openjdk_rpm" \
