JdbcDatabaseContainer: fix wrong instance call (#5465)

createConnection() method calls a wrong driver instance when logging

Author: monosoul

modules/jdbc/src/main/java/org/testcontainers/containers/JdbcDatabaseContainer.java

@@ -232,7 +232,7 @@ public Connection createConnection(String queryString) throws SQLException, NoDr
                     logger()
                         .debug(
                             "Trying to create JDBC connection using {} to {} with properties: {}",
-                            driver.getClass().getName(),
+                            jdbcDriverInstance.getClass().getName(),
                             url,
                             info
                         );