issues with modrdn and attribute uniqueness and referential integrity
Ticket #406 - Impossible to rename entry (modrdn) with Attribute Uniqueness plugin enabled
Ticket #405 - referint modrdn not working if case is different
(cherry picked from commit 44774ce082bf6f9c6cac073cb4caf3d2bed522b0)
(cherry picked from commit 007f012d589ffea2d3ca94a9d9ea4ee15090174a)
(cherry picked from commit 72ef796e003379a97649440e3e0fd2e168c5cc14)