Reverting proxy image version to v1.0.0 to pass CI

roles/openshift_logging_elasticsearch/vars/default_images.yml

@@ -1,3 +1,3 @@
 ---
 __openshift_logging_elasticsearch_proxy_image_prefix: "docker.io/openshift/"
-__openshift_logging_elasticsearch_proxy_image_version: "latest"
+__openshift_logging_elasticsearch_proxy_image_version: "v1.0.0"