Address code review comments

Signed-off-by: Andriy Redko <andriy.redko@aiven.io>

test/framework/src/main/java/org/opensearch/test/OpenSearchTestClusterRule.java

@@ -56,6 +56,7 @@
  * on the way cluster settings are being managed.
  */
 class OpenSearchTestClusterRule implements MethodRule {
+    // Maps each TestCluster instance to the exact test suite instance that triggered its creation
     private final Map<TestCluster, OpenSearchIntegTestCase> suites = new IdentityHashMap<>();
     private final Map<Class<?>, TestCluster> clusters = new IdentityHashMap<>();
     private final Logger logger = LogManager.getLogger(getClass());