Revert "zookeeper distributed lock demo"

This reverts commit 3f47f288d99ebd2fc02ef8734d4d76299fd3a235.
Revert "Revert "zookeeper distributed lock demo""

This reverts commit 1ef1824b55d2b2076ce616e2bcadf583e79313c3.
Merge branch 'master' of https://github.com/qhwj2006/ZookeeperDistributedLock