Disabling linter due to unknown issue

Signed-off-by: Matt Farina <matt.farina@suse.com>
(cherry picked from commit 227c9cb6b6)

pkg/downloader/manager_test.go

@@ -15,6 +15,10 @@ limitations under the License.
 
 package downloader
 
+// Linter failing for unknown reason on assert. This is gofmt'd using goimports. Does not
+// happen with newer version of linter.
+// TODO: upgrade linter and fix code issues
+//nolint:goimports
 import (
 	"bytes"
 	"os"