Jianfei Hu

PR is ready for review, CI tests are also mostly green. @antonio2368 @CheSema could you take a look? Thanks!

Thanks! I touched `src/Common/ZooKeeper/examples/zkutil_test_commands_new_lib.cpp` here because it uses the `ZooKeeperImpl` constructor directly, which we changed in this PR. I will look at adding some unit test for the library.

Hi @CheSema unit test added. Can you see if anything else is missing?

Updated with recent master. Friendly ping, @CheSema could you take a look? Thanks!