User without "send" permition (nobody in this case) can send a message to the broker.

Steps to reproduce:
1. Configure the broker according to attached configuration.
2. Create a queue (send a message under a user with permition to create a queue, f.e. admin)
3. Try to send a message under a user without sending permission (nobody):

Expected results:
The message should not be delivered, SecurityException should be raised.

Current results:
The message is not delivered into the queue on the broker, but the python-qpid client hangs.

Note:
The broker behaves as expected with qpid-jms, amqpnetlite and openwire-jms clients (nobody user cannot send messages, the exception is raised).