Unknown methods on collaborators don't prompt method generation in some cases

[ciaranmcnulty]

In cases like this, we prompt to add the method signature to the interface:

function it_does_something(Collab $collab)
{
    $collab->someMethod()->willReturn();
}

however when a method is called inside the class being specced, we don't catch the error and prompt:

class  MyClassSpec extends ObjectBehaviour
{
    function it_does_something(Collab $collab)
    {
        $this->foo($collab);
    }
}

class  MyClass
{
    public function foo(Collab $collab)
    {
         $collab->someMethod();
    }
}

I think this may just be the case of handling additional Throwables inside CollaboratorMethodNotFoundListener