ATLAS-3364 : UI: Compose logout url from Atlas base path (URI)

dashboardv2/public/js/templates/site/Header.html

@@ -44,7 +44,7 @@
                                 <li class="aboutAtlas"><a href="javascript:void(0)">About</a></li>
                                 <li role="separator" class="divider"></li>
                                 <li>
-                                    <a href="logout.html"><i class="fa fa-sign-out"></i>Logout</a>
+                                    <a data-id="signOut" href="javascript:void(0)"><i class="fa fa-sign-out"></i>Logout</a>
                                 </li>
                             </ul>
                         </td>

dashboardv2/public/js/views/site/Header.js

@@ -33,7 +33,8 @@ define(['require',
             backButton: "[data-id='backButton']",
             menuHamburger: "[data-id='menuHamburger']",
             globalSearch: "[data-id='globalSearch']",
-            clearGlobalSearch: "[data-id='clearGlobalSearch']"
+            clearGlobalSearch: "[data-id='clearGlobalSearch']",
+            signOut: "[data-id='signOut']"
         },
         events: function() {
             var events = {};
@@ -68,6 +69,10 @@ define(['require',
                 });
                 $('body').toggleClass("full-screen");
             };
+            events['click ' + this.ui.signOut] = function() {
+                var path = Utils.getBaseUrl(window.location.pathname);
+                window.location = path + "/logout.html";
+            };
             return events;
 
         },