Use proper return value in cli commands

public/typo3conf/ext/ep_products/Classes/Command/ContingentCommandController.php

@@ -66,6 +66,8 @@ class ContingentCommandController extends Command
         $path = GeneralUtility::getFileAbsFileName('fileadmin/xmlexportzimmer');
         $count = $this->contingentImportService->import($path);
         $output->writeln(sprintf('%d rows imported.', $count ));
+
+        return 0;
     }
 
 }

public/typo3conf/ext/ep_products/Classes/Command/DateCommandController.php

@@ -85,6 +85,8 @@ class DateCommandController extends Command
         $settings = $this->getSettings();
         $resellerPageUid = $settings['resellerExportPageUid'];
         $this->cacheService->clearPageCache($resellerPageUid);
+
+        return 0;
     }
 
     /**

public/typo3conf/ext/ep_products/Classes/Command/ExportCommandController.php

@@ -103,6 +103,8 @@ class ExportCommandController extends Command
             $output->writeln('Exporting CSV (Google) for ' . $reseller->getName());
             $this->exportCsv($reseller, 'google', $destinationFolder);
         }
+
+        return 0;
     }
 
     /**

public/typo3conf/ext/ep_products/Classes/Command/GroupsSwissCommand.php

@@ -80,6 +80,6 @@ class GroupsSwissCommand extends Command
 
         $success = $this->groupsSwissService->publishContingents($hotelUid, $houseNumber, $apiKey);
 
-        return $success ? 1 : 0;
+        return $success ? 0 : 1;
     }
 }

public/typo3conf/ext/ep_products/Classes/Command/SnowreportCommandController.php

@@ -55,6 +55,8 @@ class SnowreportCommandController extends Command
         $this->snowreportImportService->downloadReportsXml();
         $count = $this->snowreportImportService->importSnowReportData();
         $output->writeln(sprintf('%d rows imported.', $count ));
+
+        return 0;
     }
 
 }