Fixing origin default for es proxy

roles/openshift_logging_elasticsearch/vars/default_images.yml

@@ -1,5 +1,5 @@
 ---
 __openshift_logging_elasticsearch_image_prefix: "{{ openshift_logging_image_prefix | default('docker.io/openshift/origin-') }}"
 __openshift_logging_elasticsearch_image_version: "{{ openshift_logging_image_version | default('latest') }}"
-__openshift_logging_elasticsearch_proxy_image_prefix: "{{ openshift_logging_image_prefix | default('docker.io/openshift/origin-') | regex_replace('^(.*)/origin-$', '\\1/') }}"
+__openshift_logging_elasticsearch_proxy_image_prefix: "{{ openshift_logging_image_prefix | default('docker.io/openshift/') }}"
 __openshift_logging_elasticsearch_proxy_image_version: "{{ openshift_logging_image_version | default('v1.0.0') }}"