Update DumpExtension to match what got into Symfony 3.2+
Update DumpExtension to match what got into Symfony 3.2+

bolt/bolt,nikgo/bolt,electrolinux/bolt,lenvanessen/bolt,HonzaMikula/masivnipostele,electrolinux/bolt,electrolinux/bolt,GawainLynch/bolt,romulo1984/bolt,electrolinux/bolt,GawainLynch/bolt,GawainLynch/bolt,bolt/bolt,nikgo/bolt,bolt/bolt,romulo1984/bolt,lenvanessen/bolt,lenvanessen/bolt,nikgo/bolt,GawainLynch/bolt,HonzaMikula/masivnipostele,romulo1984/bolt,nikgo/bolt,HonzaMikula/masivnipostele,romulo1984/bolt,bolt/bolt,HonzaMikula/masivnipostele,lenvanessen/bolt