Remove space prior to the key name in the REST management API

The key exposed through the REST management API contains a space character before the name. For example:

" routingType=MULTICAST,brokerName=\"0.0.0.0\",name=\"test.performance.queue\",parentName=\"test.performance.queue\",parentType=Address,serviceType=Queue,type=Broker":

Definitely, this is not a bug, but I believe it would look better without the space.