fixed missing import

Author: chernser

jdbc-v2/src/test/java/com/clickhouse/jdbc/PreparedStatementTest.java

@@ -10,6 +10,7 @@
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
 import java.sql.Statement;
 import java.sql.Types;
 import java.util.Arrays;