Avoid unnecessary re-load of collection objects

lib/dor/models/releaseable.rb

@@ -79,7 +79,7 @@ def get_release_tags_for_item_and_all_governing_sets
       return_tags = release_nodes || {}
       collections.each do |collection|
         next if collection.id == id  # recursive, so parents of parents are found, but we need to avoid an infinite loop if the collection references itself (i.e. bad data)
-        return_tags = combine_two_release_tag_hashes(return_tags, Dor.find(collection.id).get_release_tags_for_item_and_all_governing_sets)
+        return_tags = combine_two_release_tag_hashes(return_tags, collection.get_release_tags_for_item_and_all_governing_sets)
       end
       return_tags
     end