fix tests

Author: ankit--sethi

x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/action/BaseTransportInferenceActionTestCase.java

@@ -175,7 +175,7 @@ public void testMetricsAfterMissingService() {
 
         verify(listener).onFailure(assertArg(e -> {
             assertThat(e, isA(ElasticsearchException.class));
-            assertThat(e.getMessage(), is("Unknown service [" + serviceId + "] for model [" + inferenceId + "]."));
+            assertThat(e.getMessage(), is("Unknown service [" + serviceId + "] for model [" + inferenceId + "]"));
             assertThat(((ElasticsearchException) e).status(), is(RestStatus.BAD_REQUEST));
         }));
         verify(inferenceStats.inferenceDuration()).record(anyLong(), assertArg(attributes -> {