Fix issues with the settings cache when running setup on systems running Zend OpCache
Ensure opcache.revalidate_freq is set to 0 during setup

Previously, in PHP 5.5+ with Zend OpCache, setup failed if the opcache.revalidate_freq was not set to 0

Merge remote-tracking branch 'origin/pr/11202' into release-2.2

* origin/pr/11202:
  Fix issues with the settings cache when running setup on systems running Zend OpCache