Upgrade to ZooKeeper v3.4.12
Upgrade to ZooKeeper v3.4.12

Fixes #216

criteo-forks/chef-zookeeper,SimpleFinance/chef-zookeeper,evertrue/zookeeper-cookbook,SimpleFinance/chef-zookeeper,evertrue/zookeeper-cookbook,SimpleFinance/chef-zookeeper,evertrue/zookeeper-cookbook