[HUDI-2211] Fix NullPointerException in TestHoodieConsoleMetrics (#3331)

hudi-client/hudi-client-common/src/test/java/org/apache/hudi/metrics/TestHoodieConsoleMetrics.java

@@ -38,6 +38,7 @@ public class TestHoodieConsoleMetrics {
 
   @BeforeEach
   public void start() {
+    when(config.getTableName()).thenReturn("console_metrics_test");
     when(config.isMetricsOn()).thenReturn(true);
     when(config.getMetricsReporterType()).thenReturn(MetricsReporterType.CONSOLE);
     new HoodieMetrics(config, "raw_table");