DRILL-2489: Throw exception from remaining methods for closed JDBC ob…

…jects.

Refactored unit test to check all methods per interface.  (Replaced individual,
static test methods with bulk reflection-based checking.)
[Drill2489CallsAfterCloseThrowExceptionsTest]

Added DrillResultSetMetaDataImpl.

Added method overrides to check state for remaining methods from Connection,
Statement, PreparedStatement, ResultSet, ResultSetMetaData and DatabaseMetaData.

Also:
- renamed checkNotClosed to throwIfClosed.

exec/jdbc/src/main/java/org/apache/drill/jdbc/DrillConnection.java

@@ -15,7 +15,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.apache.drill.jdbc;
 
 import java.sql.Connection;