Backport PR #8317

---------

**Commit 1:**
[plugin installer] Point plugin url to artifacts.elastic.co

* Original sha: e719222da4
* Authored by Jonathan Budzenski <jon@jbudz.me> on 2016-09-16T20:53:19Z

src/cli_plugin/install/__tests__/settings.js

@@ -175,7 +175,7 @@ describe('kibana cli', function () {
 
             const expected = [
               command,
-              `https://download.elastic.co/kibana/${command}/${command}-1234.zip`
+              `https://artifacts.elastic.co/download/kibana-plugins/${command}/${command}-1234.zip`
             ];
 
             expect(settings.urls).to.eql(expected);

src/cli_plugin/install/settings.js

@@ -6,7 +6,7 @@ import { arch, platform } from 'os';
 function generateUrls({ version, plugin }) {
   return [
     plugin,
-    `https://download.elastic.co/kibana/${plugin}/${plugin}-${version}.zip`
+    `https://artifacts.elastic.co/download/kibana-plugins/${plugin}/${plugin}-${version}.zip`
   ];
 }