[grunt/s3] upgrade to aws_s3 package, grunt-s3 package is broken

grunt/config/aws_s3.js

@@ -0,0 +1,26 @@
+var config = {};
+try {
+  config = require('../../.aws-config.json');
+} catch (e) {}
+
+module.exports = {
+  upload_archives: {
+    files: [
+      {
+        expand: true,
+        cwd: '<%= distDir %>/archives',
+        src: '*',
+        dest: 'elasticsearch/elasticsearch-js/'
+      },
+    ],
+    options: {
+      accessKeyId: config.key || process.env.AWS_KEY,
+      secretAccessKey: config.secret || process.env.AWS_SECRET,
+      bucket: 'download.elasticsearch.org',
+      access: 'public-read',
+      params: {
+        'ContentDisposition': 'attachment'
+      }
+    }
+  }
+};