[JAVA-10432] Rename and enable testng-command-line module

testing-modules/testng-command-line/src/main/java/com/baeldung/testng/DateSerializerService.java

@@ -0,0 +1,11 @@
+package com.baeldung.testng;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class DateSerializerService {
+    public String serializeDate(Date date, String format) {
+        SimpleDateFormat dateFormat = new SimpleDateFormat(format);
+        return dateFormat.format(date);
+    }
+}