Merge pull request #95 from apache/fix_jira_34

[IOTDB-34] using the default close function in IoTDBMetadataResultSet

jdbc/src/main/java/org/apache/iotdb/jdbc/IoTDBMetadataResultSet.java

@@ -74,11 +74,6 @@ public class IoTDBMetadataResultSet extends IoTDBQueryResultSet {
     }
   }
 
-  @Override
-  public void close() throws SQLException {
-    throw new SQLException(METHOD_NOT_SUPPORTED);
-  }
-
   @Override
   public int findColumn(String columnName) throws SQLException {
     throw new SQLException(METHOD_NOT_SUPPORTED);