Zk smoketest does not support building test environments with higher versions of zookeeper

[opencmit2]

When the zk smoketest tool is used to build the pressure test environment, it can only be deployed to the version of zookeeper-3.4. x, which is not supported after the version of zookeeper-3.5. If the version does not support the phenomenon, can you continue to update the zk smoketest version, so that the higher version of zookeeper and the zk smoketest tool can be combined to build the pressure test environment

Version used：
zkpython-0.4.2.tar.gz zk-smoketest-master.zip zookeeper-3.4.7.tar.gz

Example：

YTHONPATH=lib.linux-x86_64-2.6 LD_LIBRARY_PATH=lib.linux-x86_64-2.6 ./zk-latencies.py --servers "xxxx:2181" --znode_count=100 --znode_size=100 --synchronous --watch_multiple=1000