Need working function to quite all servers

[ageller]

We have quitAllFireflyServers() , but that doesn't seem to work on my end. (Or maybe I'm just not using it right.)

Also, strangely on some computers (including mine) when you run the command process = spawnFireflyServer(port, method = 'flask') It actually creates 2 processes (which doesn't seem to break anything, at least on my end, but seems odd.) This may be something we need/want to investigate and fix.

[ageller]

The commit ce35d5c attempts to fix quitAllFireflyServers (by changing the grep portion of the command -- it seems that was very outdated).

Leaving this open for now in case we want to try to address the second part of the issue above.