Resolving issue with tests not running on *nix/Firefox (#190)

* Resolving issue with tests not running on *nix/Firefox

- There was an issue running the tests under *nix / Firefox that occurred due to
  Firefox not switching back to the default frame context which lead any further
  tests to fail ( as it would not be able to locate anything ).

* Adding to fix Travis

- Travis doesn't like our classes, specifying that it should use node and es6.

open_xdmod/modules/xdmod/automated_tests/test/specs/xdmod/loginPage.page.js

@@ -1,3 +1,4 @@
+/* eslint-env node, es6 */
 class LoginPage {
     login(title, theUrl, loginName, loginPassword, displayName) {
         describe('General', function () {
@@ -23,6 +24,12 @@ class LoginPage {
                 $('#txt_login_username input').setValue(loginName);
                 $('#txt_login_password input').setValue(loginPassword);
                 $('#btn_sign_in .x-btn-mc').click();
+
+                // Per: http://webdriver.io/api/protocol/frame.html#Usage
+                // Resetting the server to the page's default content
+                // This was causing issues with running the tests under
+                // Ubuntu 16.04:Firefox
+                browser.frame();
             });
             it('Display Logged in Users Name', function () {
                 $('#welcome_message').waitForExist(60000);