[BUG] SecurityAdmin tool uses incorrect http status code to handle error

[yinl]

What is the bug?

s/whoAmIRes/res

if (replicaAutoExpand != null) {
                Settings indexSettings = Settings.builder()
                    .put("index.auto_expand_replicas", replicaAutoExpand ? "0-all" : "false")
                    .build();
                Response res = restHighLevelClient.getLowLevelClient()
                    .performRequest(new Request("PUT", "/_plugins/_security/configupdate?config_types=" + Joiner.on(",").join(getTypes())));
                if (res.getStatusLine().getStatusCode() != 200) {
                    System.out.println("Unable to reload configuration because return code was " + whoAmIRes.getStatusLine());
                    return (-1);
                }

How can one reproduce the bug?
reading SecurityAdmin.java， inner the branch of if (replicaAutoExpand != null)

What is the expected behavior?
print res的http status，not whoAmIRes

What is your host/environment?

• OS: RHEL 7.2
• Version [2.18.0]
• Plugins

Do you have any screenshots?
No

Do you have any additional context?
No