@file block for kernel tests mention incorrect namespace

'Tests' and 'rules' terms need swapping for files in /tests/src/Kernel/ directory.

Example:

/**
 * @file
 * Contains \Drupal\rules\Tests\EntityViewTest.
 */
namespace Drupal\Tests\rules\Kernel;

Should be

/**
 * @file
 * Contains \Drupal\Tests\rules\EntityViewTest.
 */