bugfix NoderOrderBuilder eagerly instantiates PHPCR session

The NodeOrderBuilder eagerly instantiates the PHPCR session causing
an exception when the workspace does not exist.
hmm not very nice (-: but ok because we want to  kik the build bundle (-:
Am 14.11.2014 10:26 schrieb "dantleech" <notifications@github.com>:

> In src/Sulu/Bundle/CoreBundle/Build/NodeOrderBuilder.php:
>
> >
> > -    public function __construct(SessionManagerInterface $sessionManager, WebspaceManagerInterface $webspaceManager)
> > +    public function __construct(ContainerInterface $container)
>
> The other solution is to make a build registry that uses the container to
> load the builders lazily. But we would then still need to instantiate them
> all to resolve their dependencies, so we would have the same problem.
>
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> <https://github.com/sulu-cmf/sulu/pull/557/files#r20349345>.
>