add test case for cls_lightfs

Signed-off-by: Min Chen <minchen@ubuntukylin.com>
modified before merge

Signed-off-by: Min Chen <minchen@ubuntukylin.com>
Merge remote-tracking branch 'team/lightfs_master' into lightfs_master
Merge remote-tracking branch 'team/lightfs_master' into lightfs_master
test: add cls method test case

Signed-off-by: Min Chen <minchen@ubuntukylin.com>