LU-3357 mgs: Initialize uuid of llogs created by replace_nids

LU-3357 mgs: Initialize uuid of llogs created by replace_nids

Initialize "Target uuid" with same data as in record_start_log().

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: If7f49eda6bf2f4143d86b71392e215528ebcbf92
Reviewed-on: http://review.whamcloud.com/6395
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Artem Blagodarenko <artem_blagodarenko@xyratex.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>