Even with that adjustments it gives the error of invalid credentials for the user i specified in test login flow:
[snip]
2019-05-30 15:30:14,085+01 INFO Profile='lab.local' authn='lab.local-authn' authz='lab.local-authz' mapping='null'
2019-05-30 15:30:14,086+01 INFO API: -->Authn.InvokeCommands.AUTHENTICATE_CREDENTIALS profile='lab.local' user='node1'
2019-05-30 15:30:14,134+01 INFO API: <--Authn.InvokeCommands.AUTHENTICATE_CREDENTIALS profile='lab.local' result=CREDENTIALS_INVALID
2019-05-30 15:30:14,142+01 SEVERE Authn.Result code is: CREDENTIALS_INVALID
[ ERROR ] Login sequence failed
Please investigate details of the failure (search for lines containing SEVERE log level).
Select test sequence to execute (Done, Abort, Login, Search) [Abort]:
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Could you confirm which version of engine are you using and which version of ovirt-engine-extension-aaa-ldap-setup package?
Any interesting logs under /var/log/ovirt-engine?
Gianluca