Issue #57 bugfix

[nuxnik]

The following class: Doctrine\Common\Persistence\Event\LifecycleEventArgs is not available in ldaptools because it in not available in the composer.json and therefore results in reflection exception:

Class Doctrine\Common\Persistence\Event\LifecycleEventArgs does not exist

This has been renamed to available class "Doctrine\ORM\Event\LifecycleEventArgs" from the "doctrine/orm" bundle.

[marielatraimallanca]

Esto todavia no se fixeo?