Rework default TSB prefix and imagename to match other services

roles/template_service_broker/vars/default_images.yml

@@ -1,4 +1,4 @@
 ---
-__template_service_broker_prefix: "docker.io/openshift/"
+__template_service_broker_prefix: "docker.io/openshift/origin-"
 __template_service_broker_version: "latest"
-__template_service_broker_image_name: "origin-template-service-broker"
+__template_service_broker_image_name: "template-service-broker"

roles/template_service_broker/vars/openshift-enterprise.yml

@@ -1,4 +1,4 @@
 ---
-__template_service_broker_prefix: "registry.access.redhat.com/openshift3/"
+__template_service_broker_prefix: "registry.access.redhat.com/openshift3/ose-"
 __template_service_broker_version: "v3.7"
-__template_service_broker_image_name: "ose-template-service-broker"
+__template_service_broker_image_name: "template-service-broker"