Backport PR #7148

---------

**Commit 1:**
[node] Bump node.js to 4.4.4

* Original sha: 470404f
* Authored by Jonathan Budzenski <jbudz@users.noreply.github.com> on 2016-05-06T18:31:36Z

-------------------------------
**Backported based on diff from PR #7164**

Gruntfile.js

@@ -14,7 +14,7 @@ module.exports = function (grunt) {
     buildApp: __dirname + '/build/kibana', // build directory for the app
     configFile: __dirname + '/src/server/config/kibana.yml',
 
-    nodeVersion: '4.3.2',
+    nodeVersion: '4.4.4',
     platforms: ['darwin-x64', 'linux-x64', 'linux-x86', 'windows'],
     services: [ [ 'launchd', '10.9'], [ 'upstart', '1.5'], [ 'systemd', 'default'], [ 'sysv', 'lsb-3.1' ] ],
 

package.json

@@ -105,7 +105,7 @@
     "tar": "^1.0.1"
   },
   "engines": {
-    "node": "4.3.2",
-    "npm": "2.14.21"
+    "node": "4.4.4",
+    "npm": "2.15.1"
   }
 }