Fix creation of users inside a tenant: A tenant administrator cannot finish the process

Using Nuxeo FastTrack 7.3 and the multi tenant plugin, creating a new user is a cumbersome process, possibly event something a tenant administrator can't even do:

• The form to create a user does not allow direct creation. It must send an eMail to the user, who then must setup the password
• During the process, and even once the user has validated the password, the tenant administrator still can't see this user in the list
• You must then login as Administrator, to set the tenant id of the user

Now, you are all set. So, basically: A tenant administrator just can't create a new user belonging to their tenant