Revert "Fix Dockerhub registry URL 2 (Yelp#445)" (Yelp#446)

This reverts commit af67cc4.

Makefile.ibm

@@ -15,7 +15,7 @@ DOCKER_REGISTRY_ART := txo-toolbox-team-docker-local.artifactory.swg-devops.com
 DOCKER_USER_ART := dssadmin@us.ibm.com
 DOCKER_PASS_ART := $(ART_API_KEY)
 
-DOCKER_REGISTRY_DOCKERHUB := hub.docker.com
+DOCKER_REGISTRY_DOCKERHUB := registry.hub.docker.com
 DOCKER_USER_DOCKERHUB := $(DOCKER_HUB_USERNAME)
 DOCKER_PASS_DOCKERHUB := $(DOCKER_HUB_API_KEY)
 
@@ -85,8 +85,8 @@ docker-publish-images: docker-login
 
 docker-publish-image:
 ifeq ($(DOCKER_REGISTRY), $(DOCKER_REGISTRY_DOCKERHUB))
-	docker tag $(DOCKER_DOMAIN_LOCAL)/$(IMAGE_NAME) $(DOCKER_REGISTRY)/r/$(DOCKERHUB_DOMAIN)/$(IMAGE_NAME):$(IMAGE_TAG)
-	docker push $(DOCKER_REGISTRY)/r/$(DOCKERHUB_DOMAIN)/$(IMAGE_NAME):$(IMAGE_TAG)
+	docker tag $(DOCKER_DOMAIN_LOCAL)/$(IMAGE_NAME) $(DOCKER_REGISTRY)/$(DOCKERHUB_DOMAIN)/$(IMAGE_NAME):$(IMAGE_TAG)
+	docker push $(DOCKER_REGISTRY)/$(DOCKERHUB_DOMAIN)/$(IMAGE_NAME):$(IMAGE_TAG)
 else
 	docker tag $(DOCKER_DOMAIN_LOCAL)/$(IMAGE_NAME) $(DOCKER_REGISTRY)/$(DOCKER_DOMAIN)/$(IMAGE_NAME):$(IMAGE_TAG)
 	docker push $(DOCKER_REGISTRY)/$(DOCKER_DOMAIN)/$(IMAGE_NAME):$(IMAGE_TAG)