CP-309998: ignore small amount of pages in other nodes

Signed-off-by: Marcus Granado <marcus.granado@cloud.com>

Author: mg12

ocaml/libs/xenctrl-ext/xenctrlext.ml

@@ -156,7 +156,7 @@ module DomainNuma = struct
       let nodes =
         Array.fold_left
           (fun n pages ->
-            if pages > 0L then
+            if pages > 4096L then
               n + 1
             else
               n