Added a syspref LoadHistory addSearchHistoryToTheFirstLoggedUser to select if
you want the system to add the history of searches performed without session
when you log in as registered user.
1 - Search in the catalogue, check you are not logged
2 - Log in : your last history should appear
4 - Log out
5 - Apply the patch
6 - Repeat 1 and 2
7 - Desactivate the syspref addSearchHistoryToTheFirstLoggedUser
8 - Repeat 1 and 2 : your last history shouldn't appear
The Unit test doesn't rollback but delete the added lines : the function
get_template_and_user allway sets the autocommit to 1.