Fix go vet errors

Signed-off-by: Chris Seto <chriskseto@gmail.com>
Upstream-commit: 04f76b67c9f0a4559ef91e24873f51b81c81b957
Component: engine

components/engine/integration-cli/docker_cli_cp_utils.go

@@ -157,7 +157,7 @@ func makeTestContainer(c *check.C, options testContainerOptions) (containerID st
 		if status != 0 {
 			logs = "UNABLE TO GET LOGS"
 		}
-		c.Fatalf("failed to make test container, exit code (%d): %s", exitCode, logs)
+		c.Fatalf("failed to make test container, exit code (%s): %s", exitCode, logs)
 	}
 
 	return