Do not rely on helper being defined "outside" of the phpcr context.
Currently this is broken because the DoctrinePhpcrBundle does not create the helpers and there is all that wierd stuff going on in DoctrineCommandHelper.
The logic here is now the same as for PhpcrConsoleHelper
i think we really need to review the helper and setup things, imo instantiating the dependencies inside the command is going into the wrong direction. but until its properly fixed, this is a working quickfix.
Currently this is broken because the DoctrinePhpcrBundle does not create the helpers and there is all that wierd stuff going on in DoctrineCommandHelper.
The logic here is now the same as for PhpcrConsoleHelper