MRP-1635 llog: GPF in llog_cat_id2handle()

Remove loghandle from catalog list under cathandle->lgh_lock
llog_free_handle() is called later without lock to
prevent deadlock with transaction (MRP-606).

Signed-off-by: Andriy Skulysh <Andriy_Skulysh@xyratex.com>
Change-Id: Ifc5a00000f4b87c416ed267a8bc1154770b312f9
Reviewed-by: Alexander Zarochentsev <alexander_zarochentsev@xyratex.com>
Reviewed-by: Andrew Perepechko <Andrew_Perepechko@xyratex.com>
Reviewed-by: Alexey Lyashkov <Alexey_Lyashkov@xyratex.com>
Tested-by: Elena Gryaznova <Elena_Gryaznova@xyratex.com>
Reviewed-by: Vitaly Fertman <Vitaly_Fertman@xyratex.com>