Description of problem:
Consider the following address string,
"HELLO/world; {create: never, node: { type: topic }}", where HELLO is a pre existing exchange of type 'direct'.

Since the type of the exchange is not specified, the Java client defaults to 'topic' right at the beginning and incorrectly compares the exchange type when querying for the exchange.
The default exchange type should only be specified if an exchange needs to be created and the type is missing.

How reproducible:
Always

Steps to Reproduce:
1. Create an exchange called HELLO with type 'direct'.
2. Pass the following to the Java Drain/Spout example
   "HELLO/world; {create: never, node: { type: topic }}"
3. Observe that the JMS client complains that the exchange is not found.
  
Actual results:
The JMS client throws an exception saying the exchange is not found.

Expected results:
The JMS client should be able to verify the exchange successfully.