Examples fix: delete topic after endpoint (#3558) (#3564)

Signed-off-by: Juan López Fernández <juanlopez@eprosima.com>
(cherry picked from commit 5f2621c)

# Conflicts:
#	examples/cpp/dds/AdvancedConfigurationExample/AdvancedConfigurationSubscriber.cpp

Co-authored-by: juanlofer-eprosima <88179026+juanlofer-eprosima@users.noreply.github.com>

examples/C++/DDS/BasicConfigurationExample/BasicConfigurationSubscriber.cpp

@@ -172,10 +172,6 @@ HelloWorldSubscriber::~HelloWorldSubscriber()
 {
     if (participant_ != nullptr)
     {
-        if (topic_ != nullptr)
-        {
-            participant_->delete_topic(topic_);
-        }
         if (subscriber_ != nullptr)
         {
             if (reader_ != nullptr)
@@ -184,6 +180,10 @@ HelloWorldSubscriber::~HelloWorldSubscriber()
             }
             participant_->delete_subscriber(subscriber_);
         }
+        if (topic_ != nullptr)
+        {
+            participant_->delete_topic(topic_);
+        }
         DomainParticipantFactory::get_instance()->delete_participant(participant_);
     }
 }