Migrated environment aware to property annotation mechanism, documented properties.

examples/hawkbit-device-simulator/src/main/java/org/eclipse/hawkbit/simulator/amqp/AmqpProperties.java

@@ -14,16 +14,28 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * Bean which holds the necessary properties for configuring the AMQP
  * connection.
  *
- *
- *
  */
 @ConfigurationProperties("hawkbit.device.simulator.amqp")
 public class AmqpProperties {
 
+    /**
+     * Queue for receiving DMF messages from update server.
+     */
     private String receiverConnectorQueueFromSp;
+
+    /**
+     * Exchange for sending DMF messages to update server.
+     */
     private String senderForSpExchange;
 
+    /**
+     * Simulator dead letter queue.
+     */
     private String deadLetterQueue;
+
+    /**
+     * Simulator dead letter exchange.
+     */
     private String deadLetterExchange;
 
     public String getReceiverConnectorQueueFromSp() {