Fix for issue #3013 : Added check if Fields plugin is installed through the marketplace (#3014)
Fix for issue #3013 : Added check if Fields plugin is installed through the marketplace (#3014)

* FIX check if Fields plugin is installed through marketplace if so include hook.php from marketplace folder

* Updated fix : used function Plugin::GetPhpDir() instead
fusioninventory/fusioninventory-for-glpi,fusioninventory/fusioninventory-for-glpi,fusioninventory/fusioninventory-for-glpi,fusioninventory/fusioninventory-for-glpi,fusioninventory/fusioninventory-for-glpi,fusioninventory/fusioninventory-for-glpi