Merge pull request #45973 from thaJeztah/20.10_fix_build

[20.10] integration/daemon: fix missing import

integration/daemon/daemon_test.go

@@ -2,6 +2,7 @@ package daemon // import "github.com/docker/docker/integration/daemon"
 
 import (
 	"context"
+	"os"
 	"runtime"
 	"testing"