Updating ose-baremetal-operator builder & base images to be consisten…

…t with ART

Reconciling with https://github.com/openshift/ocp-build-data/tree/4a98c8d67fb1b0233d689c4bcc7f97e61da53999/images/ose-baremetal-operator.yml

Dockerfile

@@ -1,10 +1,10 @@
-FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-1.15-openshift-4.6 AS builder
+FROM registry.ci.openshift.org/ocp/builder:rhel-8-golang-1.15-openshift-4.6 AS builder
 WORKDIR /go/src/github.com/metal3-io/baremetal-operator
 COPY . .
 RUN make build
 RUN make tools
 
-FROM registry.svc.ci.openshift.org/ocp/4.6:base
+FROM registry.ci.openshift.org/ocp/4.6:base
 COPY --from=builder /go/src/github.com/metal3-io/baremetal-operator/build/_output/bin/baremetal-operator /
 COPY --from=builder /go/src/github.com/metal3-io/baremetal-operator/build/_output/bin/get-hardware-details /
 RUN if ! rpm -q genisoimage; then yum install -y genisoimage && yum clean all && rm -rf /var/cache/yum/*; fi