Description of problem:
Case multiple requests are done by REST to get a task, repetead HornetQ queues could be created throwing exceptions like:

java.lang.IllegalStateException: Binding already exists LocalQueueBinding [address=org.jbpm.integration.console.forms.TaskFormDispatcher0, queue=QueueImpl[name=org.jbpm.integration.console.forms.TaskFormDispatcher0, postOffice=PostOfficeImpl [server=HornetQServerImpl::serverUUID=453e8938-e7d6-11e2-b4fe-e4ce8f262808]]@38e5c979, filter=null, name=org.jbpm.integration.console.forms.TaskFormDispatcher0, clusterName=org.jbpm.integration.console.forms.TaskFormDispatcher0453e8938-e7d6-11e2-b4fe-e4ce8f262808]
	at org.hornetq.core.postoffice.impl.SimpleAddressManager.addBinding(SimpleAddressManager.java:59)
	at org.hornetq.core.postoffice.impl.WildcardAddressManager.addBinding(WildcardAddressManager.java:98)
	at org.hornetq.core.postoffice.impl.PostOfficeImpl.addBinding(PostOfficeImpl.java:451)
	at org.hornetq.core.server.impl.HornetQServerImpl.createQueue(HornetQServerImpl.java:1715)

... due race conditions at org.jbpm.integration.console.TaskManagement.connect() and org.jbpm.integration.console.forms.TaskFormDispatcher.connect(). 

Synchronizing these methods should fix the issue.


Steps to Reproduce:
- Performing multiple concurrent requests to /business-central-server/rs/form/task/{id}/render or by /business-central-server/rs/tasks/{idRef}

Actual results:
java.lang.IllegalStateException: Binding already exists 

Expected results:
No exception and get the form or the task requested

Additional info: