Mute flaky testCreateApiKey test (elastic#47973)

see elastic#47958

Author: jkakavas

x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authc/ApiKeyIntegTests.java

@@ -124,7 +124,8 @@ private void awaitApiKeysRemoverCompletion() throws Exception {
  assertBusy(() -> assertFalse(apiKeyService.isExpirationInProgress()));
  }
  }
-
+ 
+ @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/47958")
  public void testCreateApiKey() {
  final Instant start = Instant.now();
  final RoleDescriptor descriptor = new RoleDescriptor("role", new String[] { "monitor" }, null, null);