[ARTEMIS-142] fixing tests

https://issues.apache.org/jira/browse/ARTEMIS-142

I have previously exposed this exception as some errors were being hidden

Now that I have cleared those, It's best to remove this as some errors are now happening

artemis-core-client/src/main/java/org/apache/activemq/artemis/core/client/impl/ClientSessionFactoryImpl.java

@@ -1358,8 +1358,6 @@ public class ClientSessionFactoryImpl implements ClientSessionFactoryInternal, C
          transportConnection = null;
 
          connector = null;
-
-         throw new RuntimeException(cause.getMessage(), cause);
       }
 
       return transportConnection;