SONARJAVA-5820 S2698: add testng to description

Author: asya-vorobeva

sonar-java-plugin/src/main/resources/org/sonar/l10n/java/rules/java/S2698.html

@@ -1,7 +1,7 @@
 <h2>Why is this an issue?</h2>
-<p>Adding messages to JUnit, FEST and AssertJ assertions is an investment in your future productivity. Spend a few seconds writing them now, and
-you’ll save a lot of time on the other end when either the tests fail and you need to quickly diagnose the problem, or when you need to maintain the
-tests and the assertion messages work as a sort of documentation.</p>
+<p>Adding messages to JUnit, FEST, TestNG and AssertJ assertions is an investment in your future productivity. Spend a few seconds writing them now,
+and you’ll save a lot of time on the other end when either the tests fail and you need to quickly diagnose the problem, or when you need to maintain
+the tests and the assertion messages work as a sort of documentation.</p>
 <h3>Noncompliant code example</h3>
 <pre>
 assertEquals(4, list.size());  // Noncompliant