Merge pull request #20988 from owncloud/scrutinizer-patch-1

apps/files_external/lib/smb.php

apps/files_external/tests/amazons3migration.php

...iles_external/tests/controller/storagescontrollertest.php

apps/files_external/tests/service/backendservicetest.php

apps/files_sharing/appinfo/application.php

apps/files_sharing/lib/cache.php

...iles_sharing/lib/controllers/externalsharescontroller.php

apps/files_sharing/lib/controllers/sharecontroller.php

apps/files_sharing/lib/middleware/sharingcheckmiddleware.php

apps/files_sharing/lib/sharedstorage.php