Merge pull request #729 from Nirothipan/master

Virtual fire alarm advance agent startup siddhi exception

src/main/java/org/wso2/carbon/device/mgt/iot/virtualfirealarm/agent/core/AgentManager.java

@@ -114,8 +114,8 @@ public class AgentManager {
             agentCommunicator.put(AgentConstants.XMPP_PROTOCOL, xmppCommunicator);
 
         } catch (TransportHandlerException e) {
-            log.error("XMPP Endpoint String - " + agentConfigs.getXmppServerEndpoint() +
-                              ", provided in the configuration file is invalid.");
+            log.info("XMPP Endpoint String - " + agentConfigs.getXmppServerEndpoint() +
+                    ", provided in the configuration file is invalid. XMPP is not configured.");
         }
         String mqttTopic = String.format(AgentConstants.MQTT_SUBSCRIBE_TOPIC, agentConfigs.getTenantDomain(),
                                          agentConfigs.getDeviceId());