Zend\Config\Writer\PhpArray - quote strings as var_export would
Merge pull request #5757 from ralphschindler/hotfix/config-writer-phparray-needs-to-respect-the-double-quote

Zend\Config\Writer\PhpArray needs to use var_export for strings, not addslahes()
Merge branch 'hotfix/5757' into develop

Close #5757
Fixes zfcampus/zf-apigility-admin#74