Thank you Noriko and Simon for your careful reviews.
I modified the fix:

I modified the test case following the recommended modifications

https://fedorahosted.org/389/ticket/48266

https://fedorahosted.org/389/attachment/ticket/48266/0001-Ticket-48266-3-Fractional-replication-evaluates-severa.patch

https://fedorahosted.org/389/attachment/ticket/48266/0001-Ticket-48266-2-test-case.patch