Drive: also rename document title if file name is updated in Drive

Currently, by default, if a file is renamed in Nuxeo Drive, the file attached to the related document on the server is renamed. As for the document title, it is only renamed if it was strictly equal to the filename, else it is not.
That means that in the case of documents created by drag and drop for example, such a rename of the title will apply, as at creation the file name is used as a title.
But for documents manually created for which the title is different from the attached file name it will not.

This can be surprising: renaming local files and not seing the doc titles renamed on the server.

We should always rename the doc title by default, and make the current behaviour available as an option of the nuxe-drive addon.