Fixing mock registry

Author: jonathan-buttner

x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/services/elastic/authorization/ElasticInferenceServiceAuthorizationHandlerTests.java

@@ -96,7 +96,7 @@ public void testSecondAuthResultRevokesAuthorization() throws Exception {
         handlerRef.set(
             new ElasticInferenceServiceAuthorizationHandler(
                 createWithEmptySettings(taskQueue.getThreadPool()),
-                modelRegistry,
+                mockModelRegistry(taskQueue.getThreadPool()),
                 requestHandler,
                 initDefaultEndpoints(),
                 EnumSet.of(TaskType.SPARSE_EMBEDDING, TaskType.CHAT_COMPLETION),