sync-socket fallback blocked ports

[JacobFischer]

If you are running >=2 js clients againsts against each other, and they all have to fallback to sync-socket, their worker threads will conflict on the same port, so only the first will initiailize.

To fix this we need to initialize the workerPort at a different number than the other clients. This may require figuring out if another process of the same name is running on the machine, or simply just adding a random number to the port and pray to avoid collisions.