Don't use to-be-deprecated names

examples/1-1/sampler.cxx

@@ -30,7 +30,7 @@ struct Sampler : fair::mq::Device
         // create message object with a pointer to the data buffer, its size,
         // custom deletion function (called when transfer is done),
         // and pointer to the object managing the data buffer
-        FairMQMessagePtr msg(NewMessage(
+        fair::mq::MessagePtr msg(NewMessage(
             const_cast<char*>(text->c_str()),
             text->length(),
             [](void* /*data*/, void* object) { delete static_cast<std::string*>(object); },

examples/1-1/sink.cxx

@@ -27,7 +27,7 @@ struct Sink : fair::mq::Device
         fMaxIterations = fConfig->GetProperty<uint64_t>("max-iterations");
     }
 
-    bool HandleData(FairMQMessagePtr& msg, int)
+    bool HandleData(fair::mq::MessagePtr& msg, int)
     {
         LOG(info) << "Received: \"" << std::string(static_cast<char*>(msg->GetData()), msg->GetSize()) << "\"";