Updating ose-network-metrics-daemon builder & base images to be consi…

…stent with ART (#29)

Reconciling with https://github.com/openshift/ocp-build-data/tree/ac81dd4ff0bd57c4e75058d25b40615b92948259/images/ose-network-metrics-daemon.yml

Dockerfile.openshift

@@ -1,5 +1,5 @@
 # This dockerfile is specific to building the network metrics daemon for OpenShift
-FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-1.15-openshift-4.6 as builder
+FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-1.15-openshift-4.7 AS builder
 
 # Add everything
 ENV PKG_NAME=github.com/openshift/network-metrics-daemon
@@ -13,7 +13,7 @@ RUN make build-bin
 
 WORKDIR /
 
-FROM registry.svc.ci.openshift.org/ocp/4.6:base
+FROM registry.svc.ci.openshift.org/ocp/4.7:base
 COPY --from=builder /go/src/github.com/openshift/network-metrics-daemon/bin/network-metrics-daemon /usr/bin/network-metrics
 
 LABEL io.k8s.display-name="Network Metrics Daemon" \