Add exception if sonata_type_admin has not association admin
Add exception if sonata_type_admin has not association admin
rschumacher/SonataDoctrineORMAdminBundle,nlzet/SonataDoctrineORMAdminBundle,aitboudad/SonataDoctrineORMAdminBundle,sonata-project/SonataDoctrineORMAdminBundle,rschumacher/SonataDoctrineORMAdminBundle,rmzamora/SonataDoctrineORMAdminBundle,pulzarraider/SonataDoctrineORMAdminBundle,nlzet/SonataDoctrineORMAdminBundle,rmzamora/SonataDoctrineORMAdminBundle,aurelien-vtech/SonataDoctrineORMAdminBundle,aurelien-vtech/SonataDoctrineORMAdminBundle,mweimerskirch/SonataDoctrineORMAdminBundle,Bladrak/SonataDoctrineORMAdminBundle,aurelien-vtech/SonataDoctrineORMAdminBundle,pulzarraider/SonataDoctrineORMAdminBundle,nlzet/SonataDoctrineORMAdminBundle,rschumacher/SonataDoctrineORMAdminBundle,rmzamora/SonataDoctrineORMAdminBundle,EmmanuelVella/SonataDoctrineORMAdminBundle,pulzarraider/SonataDoctrineORMAdminBundle,nlzet/SonataDoctrineORMAdminBundle,rschumacher/SonataDoctrineORMAdminBundle