move all globals inside run()

[jedwards1211]

Calling run() directly in a script more than once doesn't work right because there are global variables in the supervisor module, so when I change files watched by the first run() call, it restarts the command to the second run() call.

Simply moving all of these variables (and functions) inside run() should fix this without causing problems for anything else

[petruisfan]

Hello! Thx for the pull request.
Unfortunately the code does not work. I get the error "TypeError: findAllWatchFiles is not a function". Please update your pr.

[jedwards1211]

Okay, I fixed the tests, except that I can't figure out how to get the test process to terminate; something in supervisor.js is keeping the process alive. There was a call to process.kill() but I removed it because it was missing a pid argument. I added finally blocks to kill the child process and file watchers at the end of each test case.