Fix Winzou sm.factory with Bundle 0.3

[macintoshplus]

Q	A
Bug fix?	yes
New feature?	no
BC breaks?	no
Deprecations?	no
Related tickets	none
License	MIT

When this master version is used with Winzou State Machine Bundle 0.3 and Sylius dev-master, the dependency injection throw this exception:

[Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException]                    
  The service "twig" has a dependency on a non-existent service "SM\Factory\FactoryInterface".

It's true because the service id is sm.factory and a alias is defined with same name.

The realy behavior need is define alias from sm.factory to interface if the service id sm.factory exists. And define alias fromt interface to sm.factory if service id sm.factory is not defined.

And same behavior for service sm.callback_factory and sm.callback.cascade_transition.

[loic425]

@macintoshplus I fixed that in #182
More exactly here https://github.com/Sylius/SyliusResourceBundle/pull/182/files#diff-e35630b6ffa002e90b1e44996cd322cb

[macintoshplus]

@loic425 Nice and good job. I close my PR.