Cecilia Vela Gurovic authored Sep 14, 2020 and Robert Lyon committed May 25, 2021

When a user is switch from 'No institution' to an institution,
the auth instance needs to be updated in the usr table
to be linked to an authentication method from this new institution

Also we should allocate the person with the same type of auth method
if possible, otherwise allocate the top priority auth method

behatnotneeded

Change-Id: I9431c1a5c3f6e6b44972ac14ad644abcb076023e