server pages clean up (#70)

This checkin includes:

1. Reduced unecessary states variables and varibles.
2. Minor lints clean up.
3. Rearranged the displayed roles order.

Author: Gloria Gu

Diff for: api/api.json

@@ -1,28 +1,2 @@
 {
-  "availableServers": [
-    {
-      "id": 1000010015,
-      "last_checkin": "<DateTime '20170728T18:23:19' at 7f5f4fcd8f38>",
-      "name": "192.168.122.68",
-      "outdated_pkg_count": 0
-    },
-    {
-      "id": 1000010007,
-      "last_checkin": "<DateTime '20170728T15:06:44' at 7f5f4fcd8fc8>",
-      "name": "suma-refhead-min-centos7.mgr.suse.de",
-      "outdated_pkg_count": 0
-    },
-    {
-      "id": 1000010009,
-      "last_checkin": "<DateTime '20170728T21:44:18' at 7f5f4fceb050>",
-      "name": "suma-refhead-min-sles12sp2.mgr.suse.de",
-      "outdated_pkg_count": 0
-    },
-    {
-      "id": 1000010004,
-      "last_checkin": "<DateTime '20170728T14:56:07' at 7f5f4fceb098>",
-      "name": "suma-refhead-minssh-sles12sp2.mgr.suse.de",
-      "outdated_pkg_count": 0
-    }
-  ]
 }

Diff for: src/components/ContextMenu.js

@@ -3,7 +3,6 @@ import ReactDOM from 'react-dom';
 import '../Deployer.css';
 import { translate } from '../localization/localize.js';
 
-
 class ContextMenuItems extends Component {
   constructor(props) {
     super(props);