Boaz Leskes 1df2d3015e Add OS name to _nodes and _cluster/nodes
we currently don't expose this.

This adds the following to the OS section of `_nodes`:

```
"os": {
     "name": "Mac OS X",
     ...
 }
 ```

 and the following to the OS section of `_cluster/stats`:

 ```
      "os": {
         ...
          "names": [
             {
                "name": "Mac OS X",
                "count": 1
             }
          ],
          ...
       },
 ```

Closes #11807
2015-06-22 20:36:29 +02:00
..