Refactoring AbstractTask. Rename set_tags to set_tags=, set_tags is not used anymore.
Refactoring AbstractTask. Rename set_tags to set_tags=, set_tags is not used anymore.

webstream-io/jobsworth,xuewenfei/jobsworth,webstream-io/jobsworth,xuewenfei/jobsworth,ari/jobsworth,digitalnatives/jobsworth,digitalnatives/jobsworth,rafaspinola/jobsworth,rafaspinola/jobsworth,digitalnatives/jobsworth,webstream-io/jobsworth,xuewenfei/jobsworth,ari/jobsworth,rafaspinola/jobsworth,digitalnatives/jobsworth,webstream-io/jobsworth,digitalnatives/jobsworth,ari/jobsworth,xuewenfei/jobsworth,rafaspinola/jobsworth,ari/jobsworth