Make graceful shutdown more graceful by actually waiting for sockets (and others) to close. Ongoing effort.

lib/roles/reaper.js

@@ -46,4 +46,9 @@ module.exports = function(options) {
 
   timer = setInterval(reap, options.reapInterval)
   log.info('Reaping devices with no heartbeat')
+
+  lifecycle.observe(function() {
+    clearTimeout(timer)
+    push.close()
+  })
 }