OR-863 now with mongoose 3.8.19, required attribute (String) of nested object is correctly checked. It brokes our tests
Merge pull request #572 in OR/rse from ~SLEMAISTRE/rse:OR-863 to master

* commit '244ff0678143479ae4bbaba9e8479a9726f18928':
  OR-863 now with mongoose 3.8.19, required attribute (String) of nested object is correctly checked. It brokes our tests