ENG-5882: Update JDBC ResultSetMetaData to use properties from
VoltType rather than separately case-d values.
- Add ResultSetMetaData test cases to TestJDBCDriver
- Also, fix two erroneous values with VARBINARY.  It is unsigned and
not case-sensitive.
Merge pull request #1144 from VoltDB/eng5882-real

ENG-5882, r=scooper