During a bind, if the target entry is not reachable the operation may complete without sending result

[tbordaz]

Issue Description
The issue was found with tests/suites/mapping_tree/referral_during_tot_init_test.py

During a bind, if the target entry is not reachable (backend, referral, bind callback) then the bind operation complete but does not send a reponse. So the client hang (until connection timeout).

Note This type of bug may exist with others types of operation

Package Version and Platform:

• all version

Steps to Reproduce
Run in loop tests/suites/mapping_tree/referral_during_tot_init_test.py

Expected results
ldap client should receive a bind reponse

[tbordaz]

db514a1..05961eb master
cb21e1a..389188c 389-ds-base-2.0
a2a55e8..2562d28 389-ds-base-1.4.4
7309779..5e2404f 389-ds-base-1.4.3
9a9292f..e1cd8b0 389-ds-base-1.3.10