Fix usage of showChildren and remove reference to symfony1 context
Fix usage of showChildren and remove reference to symfony1 context

stof/KnpMenuBundle,Nek-/KnpMenuBundle,Soullivaneuh/KnpMenuBundle,piotrantosik/KnpMenuBundle,WouterJ/KnpMenuBundle,benji07/KnpMenuBundle,craue/MenuBundle,KnpLabs/KnpMenuBundle,Soullivaneuh/KnpMenuBundle,bocharsky-bw/KnpMenuBundle,javiereguiluz/KnpMenuBundle