It is quite common that the PHP interpreter that is launched in CLI is different that the one used by the webserver. So iTop code launched by CLI could run in a context that doesn't meet iTop requirements !
This adds in the following scripts the same control that is done on the setup wizard first step :
* cron.php
* backup, check-backup
* export, exportv2
* bulk import
* synchro-exec, synchro-import
If the check throws at least one error then the script is stopped with an appropriate message, and a log is made (IssueLog, Error level, CLI channel)