Set sf-notifier image tag to 0.2-mcp0

Includes fixes for reusing session

Change-Id: Ia7db6a5cf54110a82cda10631dada40eb4670d90
Related-bug: PROD-29347 (PROD:29347)
diff --git a/defaults/docker_images.yml b/defaults/docker_images.yml
index 2457920..0018e84 100644
--- a/defaults/docker_images.yml
+++ b/defaults/docker_images.yml
@@ -38,7 +38,7 @@
     docker_image_remote_agent: "${_param:mcp_docker_registry}/openstack-docker/telegraf:${_param:mcp_version}"
     docker_image_remote_collector: "${_param:mcp_docker_registry}/openstack-docker/heka:${_param:mcp_version}"
     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_sf_notifier: "${_param:mcp_docker_registry}/openstack-docker/sf_notifier:0.2-mcp0"
     ##
     docker_image_cockroachdb: "${_param:mcp_docker_registry}/mirantis/external/cockroach/cockroach:v2.1.1"
     # keycloak