Fix bug in AbstarctTask: code was moved from Task model, I forgot to change class name.
Fix bug in AbstarctTask: code was moved from Task model, I forgot to change class name.

digitalnatives/jobsworth,ari/jobsworth,rafaspinola/jobsworth,digitalnatives/jobsworth,digitalnatives/jobsworth,ari/jobsworth,arunagw/clockingit,ari/jobsworth,rafaspinola/jobsworth,webstream-io/jobsworth,ari/jobsworth,webstream-io/jobsworth,xuewenfei/jobsworth,digitalnatives/jobsworth,xuewenfei/jobsworth,rafaspinola/jobsworth,evinoca/clockingit,evinoca/clockingit,webstream-io/jobsworth,arunagw/clockingit,xuewenfei/jobsworth,arunagw/clockingit,evinoca/clockingit,webstream-io/jobsworth,evinoca/clockingit,digitalnatives/jobsworth,xuewenfei/jobsworth,rafaspinola/jobsworth