Fix ability to create and use a Folder whose name is the same as the context root

You can create a document of type Folder with dc:title -> ecm:name same as the context root (defaults to nuxeo), you can create documents inside, but when clicking on the documents inside the Folder, you get the attached exception and cannot use the document.

How to reproduce:

• Start a Nuxeo 9.10 (optionally hotfixed)
• create a Folder named nuxeo
• inside the nuxeo Folder, create a Note
  => You get the above exception
• go back into the Folder => OK
• Click on the Note document
  => You get the above exception