Updating ose-machine-config-operator images to be consistent with ART

Reconciling with https://github.com/openshift/ocp-build-data/tree/faddb23c310d941d9e9c30c97c6d205f694474cc/images/ose-machine-config-operator.yml

Dockerfile.rhel7

@@ -1,12 +1,12 @@
 # THIS FILE IS GENERATED FROM Dockerfile DO NOT EDIT
-FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-1.15-openshift-4.7 AS builder
+FROM registry.ci.openshift.org/ocp/builder:rhel-8-golang-1.15-openshift-4.7 AS builder
 WORKDIR /go/src/github.com/openshift/machine-config-operator
 COPY . .
 # FIXME once we can depend on a new enough host that supports globs for COPY,
 # just use that.  For now we work around this by copying a tarball.
 RUN make install DESTDIR=./instroot && tar -C instroot -cf instroot.tar .
 
-FROM registry.svc.ci.openshift.org/ocp/4.7:base
+FROM registry.ci.openshift.org/ocp/4.7:base
 COPY --from=builder /go/src/github.com/openshift/machine-config-operator/instroot.tar /tmp/instroot.tar
 RUN cd / && tar xf /tmp/instroot.tar && rm -f /tmp/instroot.tar
 COPY install /manifests