Use the LabKit logging infrastructure

_support/fake-auth-backend.go

channel_test.go

cmd/gitlab-zip-cat/main.go

internal/artifacts/artifacts_test.go

internal/artifacts/entry.go

internal/channel/channel.go

internal/helper/accesslogformatter_test.go

internal/helper/helpers.go

internal/helper/helpers_test.go

internal/helper/logging.go

internal/helper/logging_test.go

internal/helper/raven.go

internal/log/logrus.go

internal/log/logrus_test.go

internal/objectstore/multipart.go

internal/objectstore/object.go

internal/objectstore/uploader.go

internal/redis/keywatcher.go

internal/redis/redis.go

internal/sendfile/sendfile.go