Child path not updated when parent restored from trash

This can be reproduced on nightly:

1. create a folder named pouetFolder
2. create a folder in it named pouetFolderChild
3. trash pouetFolderChild
4. trash pouetFolder
5. After trashing the parent folder, its path is renamed and the isTrashed flag is set:

   curl -sSL -u Administrator:Administrator https://nightly.nuxeo.com/nuxeo/api/v1/path/default-domain/workspaces/pouetSpace/pouetFolder._1568188481461_.trashed | jq .
   {
     "entity-type": "document",
     "repository": "default",
     "uid": "3d3e1aae-5b1c-4314-b720-10b42e8d51d5",
     "path": "/default-domain/workspaces/pouetSpace/pouetFolder._1568188481461_.trashed",
     "type": "Folder",
     "state": "project",
     "parentRef": "e4e625f9-55cb-4d8b-bb12-8e8d363447ce",
     "isCheckedOut": true,
     "isVersion": false,
     "isProxy": false,
     "changeToken": "2-0",
     "isTrashed": true,
     "title": "pouetFolder",
     "lastModified": "2019-09-11T07:54:01.837Z",
     "facets": [
       "Folderish",
       "NXTag"
     ],
     "schemas": [
       "common",
       "dublincore",
       "facetedTag"
     ]
   }
   

   And so does the child:

   curl -sSL -u Administrator:Administrator https://nightly.nuxeo.com/nuxeo/api/v1/path/default-domain/workspaces/pouetSpace/pouetFolder._1568188481461_.trashed/pouetFolderChild._1568188472362_.trashed | jq .
   {
     "entity-type": "document",
     "repository": "default",
     "uid": "3ef8262d-00fa-4958-9524-58248461470f",
     "path": "/default-domain/workspaces/pouetSpace/pouetFolder._1568188481461_.trashed/pouetFolderChild._1568188472362_.trashed",
     "type": "Folder",
     "state": "project",
     "parentRef": "3d3e1aae-5b1c-4314-b720-10b42e8d51d5",
     "isCheckedOut": true,
     "isVersion": false,
     "isProxy": false,
     "changeToken": "2-0",
     "isTrashed": true,
     "title": "pouetFolderChild",
     "lastModified": "2019-09-11T07:54:17.323Z",
     "facets": [
       "Folderish",
       "NXTag"
     ],
     "schemas": [
       "common",
       "dublincore",
       "facetedTag"
     ]
   }

6. Restore the parent pouetFolder and observe the parent's path is renamed and cannot be found by its trashed path:

   curl -sSL -u Administrator:Administrator [https://nightly.nuxeo.com/nuxeo/api/v1/path/default-domain/workspaces/pouetSpace/pouetFolder._1568188481461_.trashed] | jq .
   { "entity-type": "exception", "status": 404, "message": "/default-domain/workspaces/pouetSpace/pouetFolder._1568188481461_.trashed" }
   

   But only by its original path:

   curl -sSL -u Administrator:Administrator https://nightly.nuxeo.com/nuxeo/api/v1/path/default-domain/workspaces/pouetSpace/pouetFolder | jq .
   {
     "entity-type": "document",
     "repository": "default",
     "uid": "3d3e1aae-5b1c-4314-b720-10b42e8d51d5",
     "path": "/default-domain/workspaces/pouetSpace/pouetFolder",
     "type": "Folder",
     "state": "project",
     "parentRef": "e4e625f9-55cb-4d8b-bb12-8e8d363447ce",
     "isCheckedOut": true,
     "isVersion": false,
     "isProxy": false,
     "changeToken": "3-0",
     "isTrashed": false,
     "title": "pouetFolder",
     "lastModified": "2019-09-11T07:54:01.837Z",
     "facets": [
       "Folderish",
       "NXTag"
     ],
     "schemas": [
       "common",
       "dublincore",
       "facetedTag"
     ]
   }
   

   Which is correct and expected.

7. Nevertheless, the child is untrashed but its path is not renamed.
   The isTrashed flag is unset but the trashed path remains.
   Trying to access it through its trashed path still works:

   curl -sSL -u Administrator:Administrator https://nightly.nuxeo.com/nuxeo/api/v1/path/default-domain/workspaces/pouetSpace/pouetFolder/pouetFolderChild._1568188472362_.trashed | jq .
   {
     "entity-type": "document",
     "repository": "default",
     "uid": "3ef8262d-00fa-4958-9524-58248461470f",
     "path": "/default-domain/workspaces/pouetSpace/pouetFolder/pouetFolderChild._1568188472362_.trashed",
     "type": "Folder",
     "state": "project",
     "parentRef": "3d3e1aae-5b1c-4314-b720-10b42e8d51d5",
     "isCheckedOut": true,
     "isVersion": false,
     "isProxy": false,
     "changeToken": "3-0",
     "isTrashed": false,
     "title": "pouetFolderChild",
     "lastModified": "2019-09-11T07:54:17.323Z",
     "facets": [
       "Folderish",
       "NXTag"
     ],
     "schemas": [
       "common",
       "dublincore",
       "facetedTag"
     ]
   }
   

   Obviously the original path has not been restored:

   curl -sSL -u Administrator:Administrator https://nightly.nuxeo.com/nuxeo/api/v1/path/default-domain/workspaces/pouetSpace/pouetFolder/pouetFolderChild | jq .
   {
     "entity-type": "exception",
     "status": 404,
     "message": "/default-domain/workspaces/pouetSpace/pouetFolder/pouetFolderChild"
   }
   

   Expected behavior: the restored children documents should have their path updated like the parent.