Freeze prometheus-es-exporter image tag to 0.5.1-mcp0

- forked code
- includes fix for missing index issue

Picked from: I96ecaa9abf8dd299e255e6593b3a60120507b002
Related-bug: PROD-27906 (PROD:27906)

Change-Id: I4482b1729d72d5d159fc46482a276fc299f4dcaf
diff --git a/defaults/docker_images.yml b/defaults/docker_images.yml
index 78c6532..8df9699 100644
--- a/defaults/docker_images.yml
+++ b/defaults/docker_images.yml
@@ -29,7 +29,7 @@
     docker_image_alerta: "${_param:mcp_docker_registry}/mirantis/external/alerta-web:${_param:mcp_version}"
     docker_image_alertmanager: "${_param:mcp_docker_registry}/openstack-docker/alertmanager:2019.2.4"
     docker_image_grafana: "${_param:mcp_docker_registry}/openstack-docker/grafana:${_param:mcp_version}"
-    docker_image_prometheus_es_exporter: "${_param:mcp_docker_registry}/mirantis/external/braedon/prometheus-es-exporter:0.5.1"
+    docker_image_prometheus_es_exporter: "${_param:mcp_docker_registry}/openstack-docker/prometheus-es-exporter:0.5.1-mcp0"
     docker_image_prometheus: "${_param:mcp_docker_registry}/openstack-docker/prometheus:${_param:mcp_version}"
     docker_image_prometheus_gainsight: "${_param:mcp_docker_registry}/openstack-docker/gainsight:2019.2.3"
     docker_image_prometheus_gainsight_elasticsearch: "${_param:mcp_docker_registry}/openstack-docker/gainsight_elasticsearch:${_param:mcp_version}"