- switched system jump/kill-data update cronjob from XML API to ESI

- use internal DEBUG level for MySQL ERRORMODE
- increased MySQL version 5.6 => 5.7
- fixed bug in System auto search form element (select2)
- code cleanup

app/main/controller/setup.php

@@ -39,7 +39,6 @@ class Setup extends Controller {
         'CCP_SSO_SECRET_KEY',
         'CCP_ESI_URL',
         'CCP_ESI_DATASOURCE',
-        'CCP_XML',
         'SMTP_HOST',
         'SMTP_PORT',
         'SMTP_SCHEME',