[WFLY-2666] Fixing NPE

[asoldano]

https://issues.jboss.org/browse/WFLY-2666

[wildfly-ci]

Build 2019 is now running using a merge of 784fe48

[wildfly-ci]

Build 2019 outcome was FAILURE using a merge of 784fe48
Summary: Tests failed: 2 (2 new), passed: 5522, ignored: 73 Build time: 1:54:53

Build problems:

Failed tests detected

org.hornetq.api.core.HornetQConnectionTimedOutException: HQ119013: Timed out waiting to receive cluster topology. Group:null
org.hornetq.api.core.HornetQConnectionTimedOutException: HQ119013: Timed out waiting to receive cluster topology. Group:null
    at org.hornetq.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:950)
    at org.jboss.as.test.smoke.messaging.client.messaging.MessagingClientTestCase.createClientSessionFactory(MessagingClientTestCase.java:167)
    at org.jboss.as.test.smoke.messaging.client.messaging.MessagingClientTestCase.testMessagingClientUsingHTTPPort(MessagingClientTestCase.java:76)
javax.jms.JMSException: Failed to create session factory
javax.jms.JMSException: Failed to create session factory
    at org.hornetq.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:950)
    at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(HornetQConnectionFactory.java:672)
    at org.hornetq.jms.client.HornetQConnectionFactory.createConnection(HornetQConnectionFactory.java:115)
    at org.jboss.as.test.smoke.messaging.client.jms.JmsClientTestCase.doSendAndReceive(JmsClientTestCase.java:120)
    at org.jboss.as.test.smoke.messaging.client.jms.JmsClientTestCase.testSendAndReceiveUsingHTTPPort(JmsClientTestCase.java:109)

Failed tests

org.jboss.as.test.smoke.messaging.client.messaging.MessagingClientTestCase.testMessagingClientUsingHTTPPort: org.hornetq.api.core.HornetQConnectionTimedOutException: HQ119013: Timed out waiting to receive cluster topology. Group:null
    at org.hornetq.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:950)
    at org.jboss.as.test.smoke.messaging.client.messaging.MessagingClientTestCase.createClientSessionFactory(MessagingClientTestCase.java:167)

org.jboss.as.test.smoke.messaging.client.jms.JmsClientTestCase.testSendAndReceiveUsingHTTPPort: javax.jms.JMSException: Failed to create session factory
    at org.hornetq.core.client.impl.ServerLocatorImpl.createSessionFactory(ServerLocatorImpl.java:950)
    at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(HornetQConnectionFactory.java:672)