Backport of:

ENG-6231: If the JDBC connection URL contains even one valid and
functional VoltDB node, go ahead and connect.

git cherry-pick 9da73ec3e547b6df8fcf14a5442b6ddb7f2701ec

Fixed LocalCluster method name change.
Fixed breaking JDBCMultiNodeConnection unit test
Bump version to 4.0.1.6