Get rid of mcp_version for external images

Related-Prod: PROD-18536 (PROD:18536)

Change-Id: I748aa473f10d3c9067c7a06b1f36bbb6059451d1
diff --git a/defaults/docker_images.yml b/defaults/docker_images.yml
index a52fbc6..2dede15 100644
--- a/defaults/docker_images.yml
+++ b/defaults/docker_images.yml
@@ -1,13 +1,13 @@
 parameters:
   _param:
     # CI\CD
-    docker_image_compose:    "${_param:mcp_docker_registry}/mirantis/external/compose:${_param:mcp_version}"
+    docker_image_compose:    "${_param:mcp_docker_registry}/mirantis/external/docker/compose:1.17.1"
+    # 2.6.2 version, from 12/18/2108, differ from latest 2.6.2 upstream - update next cycle
     docker_image_registry:   "${_param:mcp_docker_registry}/mirantis/external/registry:${_param:mcp_version}"
     docker_image_visualizer: "${_param:mcp_docker_registry}/mirantis/external/visualizer:${_param:mcp_version}"
-    # openldap:1.1.8
-    docker_image_openldap: "${_param:mcp_docker_registry}/mirantis/external/openldap:${_param:mcp_version}"
+    docker_image_openldap: "${_param:mcp_docker_registry}/mirantis/external/osixia/openldap:1.1.8"
     docker_image_postgresql: "${_param:mcp_docker_registry}/mirantis/external/library/postgres:9.6.10"
-    # library/mongo:3.4 #G
+    # 3.4.13, from Feb 15, differ from 3.4.13 upstream verison, from March 14 - update next cycle
     docker_image_mongodb: "${_param:mcp_docker_registry}/mirantis/external/library/mongo:${_param:mcp_version}"
     ###
     # phpldapadmin:0.6.12
@@ -23,6 +23,7 @@
     docker_image_operations_api: "${_param:mcp_docker_registry}/mirantis/model-generator/operations-api:${_param:mcp_version}"
     docker_image_operations_ui: "${_param:mcp_docker_registry}/mirantis/model-generator/operations-ui:${_param:mcp_version}"
     # stacklight
+    # 6.5.0 version, from 11/29/2018, differ from latest upstream 6.5.0 - update next cycle
     docker_image_alerta: "${_param:mcp_docker_registry}/mirantis/external/alerta-web:${_param:mcp_version}"
     docker_image_alertmanager: "${_param:mcp_docker_registry}/openstack-docker/alertmanager:${_param:mcp_version}"
     docker_image_grafana: "${_param:mcp_docker_registry}/openstack-docker/grafana:${_param:mcp_version}"