Require server 3.4+ for commands that take a write concern

Author: jmikola

tests/manager/bug1163-001.phpt

@@ -4,6 +4,7 @@ PHPC-1163: Unacknowledged write concern should omit implicit session
 <?php if (PHP_INT_SIZE !== 8) { die("skip Can't represent 64-bit ints on a 32-bit platform"); } ?>
 <?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
 <?php skip_if_not_live(); ?>
+<?php skip_if_server_version('<', '3.4'); ?>
 <?php skip_if_not_clean(); ?>
 --FILE--
 <?php