Add Test framework for JDBC ResultSet navigation and fix issue with last and getrow for empty tables. Note that now GetRow returns 1 relative row numbers since it previously (incorrectly) returned 0 relative row numbers
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Add license to new JUnit test.
Removed commented out code per Izzy's feedback.
Merge pull request #1398 from VoltDB/ENG-6097-JDBC-Last-Fails

Eng 6097 jdbc last fails