Revert "Merge pull request #1732 from VoltDB/ENG-7018-limit-rows-execute-ee"

This reverts commit 7c7f8723538e5c891bd2fbcbd6179d0be7c1e0ee, reversing
changes made to 0ca73a8cc1d7ec5b6c0eae8483a9464137f63577.
Update sqlcmd readme.
Better echoed info in empty-server() function.

r=ajgent
Merge pull request #1819 from VoltDB/ENG-7231-revert-ee-limit-execute-delete

Revert "Merge pull request #1732 from VoltDB/ENG-7018-limit-rows-execute-ee"
Removed Joining cluster
Added code to hide joining count from cluster health.
Merge remote-tracking branch 'upstream/release-4.9.x' into release-4.9.x