Adds a behaviour by its name. It will search the following classes, in this order:
\component_namespace\Model\modelName\Behaviour\behaviourName
\component_namespace\Model\DataModel\Behaviour\behaviourName
\FOF30\Model\DataModel\Behaviour\behaviourName
where:
component_namespace is the namespace of the component as defined in the container
modelName is the model's name, first character uppercase, e.g. Baz
behaviourName is the $behaviour parameter, first character uppercase, e.g. Something