LU-5683 llite: Inform copytool of dataversion changes

LU-5683 llite: Inform copytool of dataversion changes

Notify copytool that a file could not be archived due to dataversion
change. This does not introduce any functional change but ensures
that errors are consistently reported in copytool logs.

Signed-off-by: Henri Doreau <henri.doreau@cea.fr>
Change-Id: I0608a0ed06cf5d45eb140ac3e32e2b58baafdf0e
Reviewed-on: http://review.whamcloud.com/14377
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Robert Read <robert.read@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>