add default values to getFlatTreeQB signature
add default values to getFlatTreeQB signature

DerekRoth/DoctrineBehaviors,MAXakaWIZARD/DoctrineBehaviors,MakG10/DoctrineBehaviors,digitalkaoz/DoctrineBehaviors,vba-ds/DoctrineBehaviors,j-ledoux/DoctrineBehaviors,shieldo/DoctrineBehaviors,nick4fake/DoctrineBehaviors,KnpLabs/DoctrineBehaviors,ksom/DoctrineBehaviors,bocharsky-bw/DoctrineBehaviors,lemoinem/DoctrineBehaviors,mediahost/DoctrineBehaviors