avoid setting create node data of invalid type in tests
avoid setting create node data of invalid type in tests

AlexanderplUs/kazoo,bsanders/kazoo,pombredanne/kazoo,rockerbox/kazoo,rgs1/kazoo,AlexanderplUs/kazoo,max0d41/kazoo,harlowja/kazoo,python-zk/kazoo,jacksontj/kazoo,bsanders/kazoo,rackerlabs/kazoo,pombredanne/kazoo,harlowja/kazoo,Asana/kazoo,python-zk/kazoo,rgs1/kazoo,tempbottle/kazoo,tempbottle/kazoo,max0d41/kazoo,jacksontj/kazoo,kormat/kazoo,rackerlabs/kazoo,kormat/kazoo,rockerbox/kazoo