Added an API /extract/asset_tags
Added an API /extract/asset_tags


Former-commit-id: b7d4343650c38a642aa6718fe14bb23b020aeb54 [formerly b7d4343650c38a642aa6718fe14bb23b020aeb54 [formerly cd9dcab4dc9c494a80736552ad7de0ea04d51846]]
Former-commit-id: b0861ccf0ee71484845d9455f8cc29e6c695eda6
Former-commit-id: d61f1c9e205485ed7363931581cc80c29396209f
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine