test: don't let debugger listen on common.PORT
test: don't let debugger listen on common.PORT

simple/test-debugger-repl has a tendency to fail and leave behind a stray
process that listens on common.PORT, making later tests fail with EADDRINUSE.

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node