BDB tuning should be applied only when BDB backend is used
389DS supports BDB and LMDB backends. FreeIPA installation fails with
LMDB backend since it tries to apply tuning for BDB backend.
Instead, tuning for BDB should be applied only when 389DS uses BDB
backend.
Fixes: https://pagure.io/freeipa/issue/9435
Signed-off-by: Viktor Ashirov <vashirov@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>