Fix require of Errors in 2 files.

[WayneMDB]

Two files use Errors class without a require of misc/errors.js.

To see the issue in action:

const mariadb = require('mariadb');

const pool = mariadb.createPool({
    host: 'localhost',
    user: 'root',
    socketPath: '/run/mysqld/mysqld.sock',
});
var conn = pool.getConnection();
pool.end(); // Interrupts the pool get, which tries to throw an error and fails.

The node error:

(node:6656) UnhandledPromiseRejectionWarning: ReferenceError: Errors is not defined