ci: update tests

.gitlab-ci.yml

 variables:
   DISABLE_FUNCTIONAL: 1
   DISABLE_ACCEPTANCE: 1
+  DISABLE_CODECEPTION: 1
   IS_LIBRARY: 1
   DISABLE_PHP_5_5: 1
 

tests/integration/bootstrap.php

@@ -23,6 +23,6 @@ tests_add_filter( 'muplugins_loaded', function () {
 }, 100 );
 
 putenv('WP_TESTS_DIR=' . getenv( 'WP_DEVELOP_DIR' ) . '/tests/phpunit');
-require_once( getenv( 'WC_DEVELOP_DIR' ) . '/tests/bootstrap.php' );
+require_once( getenv( 'WC_DEVELOP_DIR' ) . '/tests/legacy/bootstrap.php' );
 
 do_action('plugins_loaded');