For ENG-5351, make sure CL is initialized before starting rebalance
For ENG-5351, only put the payload in the last element
For ENG-5351, missing continue when looping in await()
Merge pull request #899 from VoltDB/ENG-5351

For ENG-5351, make sure CL is initialized before starting rebalance
voltkvqa: really exit when no connections remain
Updates to Hello World README based on review feedback.
Merge branch 'master' into ENG-5374