LU-5150 acl: 'cp -rp' set empty default ACL

LU-5150 acl: 'cp -rp' set empty default ACL

'cp -rp' will set an empty default ACL on target, MDD should treat
this as removing specified ACL.

add sanity 103c to verify this.

Signed-off-by: Lai Siayo <lai.siyao@intel.com>
Change-Id: I2b6947e241675c291a43999e6324bbb295d3c88d
Reviewed-on: http://review.whamcloud.com/11158
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Li Wei <wei.g.li@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>