Updated enable pass to obrigatory field.

src/FTTHBundle/Entity/OLT.php

@@ -89,7 +89,7 @@ class OLT implements DeviceInterface, TenancyIdTraitInterface, LocationInterface
     /**
      * @var string $enablePass
      *
-     * @ORM\Column(type="string", length=255, nullable=true, unique=false)
+     * @ORM\Column(type="string", length=255, nullable=false, unique=false)
      */
     protected $enablePass;