fix id mappings validation

uid and gid mappings must be set together

Signed-off-by: Ma Shimiao <[email protected]>

Author: Ma Shimiao

validation/linux_gid_mappings.go renamed to validation/linux_id_mappings.go

@@ -7,6 +7,7 @@ import (
 func main() {
 	g := util.GetDefaultGenerator()
 	g.AddOrReplaceLinuxNamespace("user", "")
+	g.AddLinuxUIDMapping(uint32(1000), uint32(0), uint32(3200))
 	g.AddLinuxGIDMapping(uint32(1000), uint32(0), uint32(3200))
 	err := util.RuntimeInsideValidate(g, nil)
 	if err != nil {