Enable secure connections via 'spring.rabbitmq.ssl.enabled' will be considered now (#394)

Signed-off-by: Dominic Schabel <dominic.schabel@bosch-si.com>

hawkbit-dmf-amqp/src/main/java/org/eclipse/hawkbit/amqp/AmqpConfiguration.java

@@ -8,6 +8,7 @@
  */
 package org.eclipse.hawkbit.amqp;
 
+import java.security.GeneralSecurityException;
 import java.time.Duration;
 import java.util.Map;
 import java.util.concurrent.Executor;
@@ -113,15 +114,22 @@ public class AmqpConfiguration {
          * @param config
          *            with standard {@link RabbitProperties}
          * @return {@link ConnectionFactory}
+         * @throws GeneralSecurityException
+         *             in case of problems with enabled SSL connections
          */
         @Bean
-        public ConnectionFactory rabbitConnectionFactory(final RabbitProperties config) {
+        public ConnectionFactory rabbitConnectionFactory(final RabbitProperties config)
+                throws GeneralSecurityException {
             final CachingConnectionFactory factory = new CachingConnectionFactory();
             factory.setRequestedHeartBeat(amqpProperties.getRequestedHeartBeat());
             factory.setExecutor(threadPoolExecutor);
             factory.getRabbitConnectionFactory().setHeartbeatExecutor(scheduledExecutorService);
             factory.setPublisherConfirms(true);
 
+            if (config.getSsl().isEnabled()) {
+                factory.getRabbitConnectionFactory().useSslProtocol();
+            }
+
             final String addresses = config.getAddresses();
             factory.setAddresses(addresses);
             if (config.getHost() != null) {