Semaphore nodes do not work well in subflows

[mattlazarowitz]

When using a semaphore node in a subflow, the semaphore configured in the template will be used across all instances of a subflow even when the intent is for the semaphore to be self-contained. It does not appear to be possible to create a separate semaphore for each instance of the subflow. A way to either set the semaphore via a message or to configure the scope of the semaphore would be helpful.