LU-3693 utils: Posix copytool fixes.

LU-3693 utils: Posix copytool fixes.

Fixed several defects in the HSM posix copytool.
- Fixed two invalid format strings.
- Made --daemon optional.
- Remove .lov entries from the archive when removing the corresponding
  files.
- When restoring a file for which no LOV EA has been saved we must not
  create the volatile with O_LOV_DELAY_CREATE. Additionally, the
  caller should be able to specify the MDT index where to create the
  volatile file. Added parameters to llapi_hsm_action_begin()
  accordingly.

Signed-off-by: Henri Doreau <henri.doreau@cea.fr>
Change-Id: I7e855b42ef459e453a16c94bfe33e9db885fe2d5
Reviewed-on: http://review.whamcloud.com/7237
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>