PLT-2899 adding clustering of app servers (#3682)

* PLT-2899 adding clustering of app servers

* PLT-2899 base framework

* PLT-2899 HA backend

* PLT-2899 Fixing config file

* PLT-2899 adding config syncing

* PLT-2899 set System console to readonly when clustering enabled.

* PLT-2899 Fixing publish API

* PLT-2899 fixing strings

webapp/routes/route_admin_console.jsx

@@ -17,6 +17,7 @@ import GitLabSettings from 'components/admin_console/gitlab_settings.jsx';
 import OAuthSettings from 'components/admin_console/oauth_settings.jsx';
 import LdapSettings from 'components/admin_console/ldap_settings.jsx';
 import SamlSettings from 'components/admin_console/saml_settings.jsx';
+import ClusterSettings from 'components/admin_console/cluster_settings.jsx';
 import SignupSettings from 'components/admin_console/signup_settings.jsx';
 import PasswordSettings from 'components/admin_console/password_settings.jsx';
 import PublicLinkSettings from 'components/admin_console/public_link_settings.jsx';
@@ -191,6 +192,10 @@ export default (
                 path='developer'
                 component={DeveloperSettings}
             />
+            <Route
+                path='cluster'
+                component={ClusterSettings}
+            />
         </Route>
         <Route path='team'>
             <Redirect