Nightly disk usage report microservice

* Generate qdirstat report every night using a modified version of the
  script referenced by https://superuser.com/a/1028907/48763 (freeware
  / public domain)

* Run the script in a slightly modified version of the "perl" stock
  Docker image

* Plumb down all the Kubernetes / OpenShift objects to build the
  image, host the script (from a ConfigMap), and run it (as a k8s
  CronJob)

* Jury-rigged Makefile to work around
  openshift/origin#8971 and share the YAML
  between test and production

openshift/Makefile

@@ -0,0 +1,21 @@
+# A Makefile that mostly works around
+# https://github.com/openshift/origin/issues/8971
+
+.PHONY: usage
+usage:
+	@echo >&2 "Usage: $(MAKE) pushtotest"
+	@echo >&2 "       $(MAKE) pushtoprod"
+
+
+.PHONY: pushtotest
+pushtotest:
+	-oc delete -n wwp-test -f disk-usage-report.yaml
+	 oc create -n wwp-test -f disk-usage-report.yaml
+
+.PHONY: pushtoprod
+pushtoprod:
+	-$(test2prod) < disk-usage-report.yaml | oc delete -n wwp -f -
+	 $(test2prod) < disk-usage-report.yaml | oc create -n wwp -f -
+
+
+test2prod := perl -pe 's|docker-registry.default.svc:5000/wwp-test|docker-registry.default.svc:5000/wwp|g'