Refs #21670: Fix destructor in tests for 2.x

Signed-off-by: cferreiragonz <carlosferreira@eprosima.com>

Author: cferreiragonz

ddsrouter_core/test/blackbox/ddsrouter_core/dds/types/test_participants.hpp

@@ -286,10 +286,6 @@ class TestSubscriber
     {
         if (participant_ != nullptr)
         {
-            if (topic_ != nullptr)
-            {
-                participant_->delete_topic(topic_);
-            }
             if (subscriber_ != nullptr)
             {
                 if (reader_ != nullptr)
@@ -298,6 +294,10 @@ class TestSubscriber
                 }
                 participant_->delete_subscriber(subscriber_);
             }
+            if (topic_ != nullptr)
+            {
+                participant_->delete_topic(topic_);
+            }
             eprosima::fastdds::dds::DomainParticipantFactory::get_instance()->delete_participant(participant_);
         }
     }