Use `flow_uuid` and `flow_name` from storage

Instead of fetching these attributes from the flow
or flow detail objects before notifying just use the
same attributes provided from storage which is the
best source of these two attributes.

Change-Id: I383e152758f177de2aac87425790ee1a82c3ca6b
Merge "Use `flow_uuid` and `flow_name` from storage"