Nit fixes and formatting following elastic#62490 comments

Fixing username

Author: BigPandaToo

x-pack/qa/oidc-op-tests/src/test/java/org/elasticsearch/xpack/security/authc/oidc/OpenIdConnectAuthIT.java

@@ -421,7 +421,7 @@ private Tuple<String, String> completeAuthentication(String redirectUri, String
             assertNotNull(responseBody.get("access_token"));
             assertNotNull(responseBody.get("refresh_token"));
             assertNotNull(responseBody.get("authentication"));
-            assertEquals("facilitator", ((Map)responseBody.get("authentication")).get("username"));
+            assertEquals("alice", ((Map)responseBody.get("authentication")).get("username"));
             return Tuple.tuple(responseBody.get("access_token").toString(), responseBody.get("refresh_token").toString());
         }
     }