When receiving an introduction message, silently drop any previous value in the reaper. Fixes a bug where restarting a provider would not bring the devices online due to it starting within the heartbeat ttl, leading the reaper to believe it has been connected all along.

lib/units/reaper/index.js

@@ -92,6 +92,7 @@ module.exports = function(options) {
   function listenToChanges() {
     sub.on('message', wirerouter()
       .on(wire.DeviceIntroductionMessage, function(channel, message) {
+        ttlset.drop(message.serial, TtlSet.SILENT)
         ttlset.bump(message.serial, Date.now())
       })
       .on(wire.DeviceHeartbeatMessage, function(channel, message) {