libct/int: allow subtests

The t.Name() usage in libcontainer/integration prevented subtests
to be used, since in such case it returns a string containing "/",
and thus it can't be used to name a container.

Fix this by replacing slashes with underscores where appropriate.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit af1688a544)
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

libcontainer/integration/template_test.go

@@ -2,6 +2,7 @@ package integration
 
 import (
 	"strconv"
+	"strings"
 	"testing"
 	"time"
 
@@ -215,7 +216,7 @@ func newTemplateConfig(t *testing.T, p *tParam) *configs.Config {
 
 	if p.systemd {
 		id := strconv.FormatInt(-int64(time.Now().Nanosecond()), 36)
-		config.Cgroups.Name = t.Name() + id
+		config.Cgroups.Name = strings.ReplaceAll(t.Name(), "/", "_") + id
 		// do not change Parent (see newContainer)
 		config.Cgroups.Parent = "system.slice"
 		config.Cgroups.ScopePrefix = "runc-test"

libcontainer/integration/utils_test.go

@@ -151,7 +151,7 @@ func copyBusybox(dest string) error {
 }
 
 func newContainer(t *testing.T, config *configs.Config) (libcontainer.Container, error) {
-	name := t.Name() + strconv.FormatInt(int64(time.Now().Nanosecond()), 35)
+	name := strings.ReplaceAll(t.Name(), "/", "_") + strconv.FormatInt(-int64(time.Now().Nanosecond()), 35)
 	root, err := newTestRoot()
 	if err != nil {
 		return nil, err