LU-6460 llite: clear LLIF_FILE_RESTORING when done

LU-6460 llite: clear LLIF_FILE_RESTORING when done

Clear LLIF_FILE_RESTORING if restore done to ensure to start again
to glimpse new attrs.

Signed-off-by: Bruno Faccini <bruno.faccini@intel.com>
Change-Id: I0f2f9532e06965273efa10e3f69e26d00676b8a6
Reviewed-on: http://review.whamcloud.com/14609
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.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>