Fix ddp-heartbeat self-test.

tools/tests/apps/ddp-heartbeat/.meteor/packages

@@ -5,3 +5,4 @@
 
 meteor-base
 underscore
+tracker

tools/tests/apps/ddp-heartbeat/server/heartbeat_test.js

@@ -12,7 +12,7 @@ var waitReactive = function (fn) {
     },
     60000
   );
-  Deps.autorun(function (c) {
+  Tracker.autorun(function (c) {
     var ret = fn();
     if (ret) {
       c.stop();

tools/tests/ddp-heartbeat.js

@@ -4,7 +4,7 @@ var Sandbox = selftest.Sandbox;
 var MONGO_LISTENING =
   { stdout: " [initandlisten] waiting for connections on port" };
 
-selftest.define("ddp-heartbeat", ["slow"], function () {
+selftest.define("ddp-heartbeat", function () {
   var s = new Sandbox({ fakeMongo: true });
   var run;