Remove unnecessary code
Revert "Remove unnecessary code"

This reverts commit df9bf13f4400b88e4e7faab16f1a991c649ee52a.
Remove unused attribute.
Merge branch 'master' of github.com:globocom/loopback-jsonschema
Remove LJSURL.buildFromRequest and create LJSRequest#ljsUrl.
Retrieve collectionName from LJSUrl Model.