DoctrineOrmAdapter FetchCol may be incorrect

[graze-deploy]

see https://scrutinizer-ci.com/g/graze/dal/issues/master/files/src/Adapter/Orm/DoctrineOrmAdapter.php?selectedLabels%5B0%5D=9&selectedSeverities%5B0%5D=10&orderField=issueCount&order=desc&honorSelectedPaths=0#inspectioncomment-62507754