Upgrade ZooKeeper to 3.5.7 (#6329)

Upgrade ZK to latest stable version. In particular we need to include:

- Split brain on log disk full https://issues.apache.org/jira/browse/ZOOKEEPER-3701
- Data loss after upgrading standalone ZK server 3.4.14 to 3.5.6 with snapshot.trust.empty=true https://issues.apache.org/jira/browse/ZOOKEEPER-3644
1 file changed
tree: 6a5728a9e862b6efbf88e957913a1c1d28963200
  1. distribution/
  2. docker/
  3. tests/