Memory issue causing crash when `delete` called on `AMQPWorker*` create via `new`

[mathemaphysics]

This happens in the unit tests and needs to be reconciled because it will likely become a problem later. When auto worker = new AMQPWorker(...) is called, it should later be possible to delete worker. This doesn't work correctly in the setup fixture class in tests/agent_t.cpp.

[mathemaphysics]

It just occurred to me that we could declare these in-place using the constructor notation, but then I realized that this isn't possible because GoogleTest fixtures don't have constructors. Silly man.