Close exchanges in HttpClientTests (elastic#115059)

Author: joegallo

modules/ingest-geoip/src/test/java/org/elasticsearch/ingest/geoip/HttpClientTests.java

@@ -47,6 +47,7 @@ public static void startServer() throws Throwable {
         server.createContext("/404/", exchange -> {
             try {
                 exchange.sendResponseHeaders(404, 0);
+                exchange.close();
             } catch (Exception e) {
                 fail(e);
             }
@@ -102,6 +103,7 @@ public boolean checkCredentials(String username, String password) {
                     exchange.getResponseHeaders().add("Location", "/" + destination + "/");
                 }
                 exchange.sendResponseHeaders(302, 0);
+                exchange.close();
             } catch (Exception e) {
                 fail(e);
             }

muted-tests.yml

@@ -318,8 +318,6 @@ tests:
 - class: org.elasticsearch.xpack.inference.rest.ServerSentEventsRestActionListenerTests
   method: testNoStream
   issue: https://github.com/elastic/elasticsearch/issues/114788
-- class: org.elasticsearch.ingest.geoip.HttpClientTests
-  issue: https://github.com/elastic/elasticsearch/issues/112618
 - class: org.elasticsearch.xpack.remotecluster.RemoteClusterSecurityWithApmTracingRestIT
   method: testTracingCrossCluster
   issue: https://github.com/elastic/elasticsearch/issues/112731