Fix reference to cockroach docker image

Change-Id: I63a75e3d4ff758c4e7d80c1e1509f8e148f18678
diff --git a/defaults/docker_images.yml b/defaults/docker_images.yml
index 91f8d2c..fa13bdf 100644
--- a/defaults/docker_images.yml
+++ b/defaults/docker_images.yml
@@ -36,7 +36,7 @@
     docker_image_remote_storage_adapter: "${_param:mcp_docker_registry}/openstack-docker/remote_storage_adapter:${_param:mcp_version}"
     docker_image_sf_notifier: "${_param:mcp_docker_registry}/openstack-docker/sf_notifier:${_param:mcp_version}"
     ##
-    docker_image_cockroachdb: "${_param:mcp_docker_registry}/mirantis/external/cockroach:v2.1.1"
+    docker_image_cockroachdb: "${_param:mcp_docker_registry}/mirantis/external/cockroach/cockroach:v2.1.1"
     # keycloak
     docker_image_keycloak_server: "${_param:mcp_docker_registry}/mirantis/external/jboss/keycloak:4.5.0.Final"
     docker_image_keycloak_proxy: "${_param:mcp_docker_registry}/mirantis/external/jboss/keycloak:3.4.2.Final"