Add hhvm and remove sf 2.2 support from travis config
Add hhvm and remove sf 2.2 support from travis config

zajca/SonataDoctrineMongoDBAdminBundle,yedey/SonataDoctrineMongoDBAdminBundle,zajca/SonataDoctrineMongoDBAdminBundle,yedey/SonataDoctrineMongoDBAdminBundle,yedey/SonataDoctrineMongoDBAdminBundle,zajca/SonataDoctrineMongoDBAdminBundle,zajca/SonataDoctrineMongoDBAdminBundle