ERP5Security: Allow user to login with a user created on the same transaction

See merge request !1759
7 jobs for master in 0 seconds (queued for 1 second)
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

00:58:30

passed ERP5.PerformanceTest-Master

00:26:54

failed ERP5.UnitTest-Master

01:22:19

failed ERP5.UnitTest-Zope2

04:30:56

passed SlapOS.Eggs.UnitTest-Master.Python2

00:13:39

passed SlapOS.Eggs.UnitTest-Master.Python3

00:17:43

passed Wendelin.UnitTest-Master

00:29:05