Convert Tower logo/strings to AWX (#253)

Sets up awx logo and strings

__tests__/App.test.jsx

@@ -74,7 +74,7 @@ describe('<App />', () => {
     // check about modal content
     const content = await waitForElement(wrapper, aboutModalContent);
     expect(content.find('dd').text()).toContain(ansible_version);
-    expect(content.find('pre').text()).toContain(`<  Tower ${version}  >`);
+    expect(content.find('pre').text()).toContain(`<  AWX ${version}  >`);
 
     // close about modal
     wrapper.find(aboutModalClose).simulate('click');

__tests__/components/BrandLogo.test.jsx

@@ -1,24 +1,24 @@
 import React from 'react';
 import { mountWithContexts } from '../enzymeHelpers';
-import TowerLogo from '../../src/components/TowerLogo';
+import BrandLogo from '../../src/components/BrandLogo';
 
 let logoWrapper;
-let towerLogoElem;
+let brandLogoElem;
 let svgElem;
 
 const findChildren = () => {
-  towerLogoElem = logoWrapper.find('TowerLogo');
+  brandLogoElem = logoWrapper.find('BrandLogo');
   svgElem = logoWrapper.find('svg');
 };
 
-describe('<TowerLogo />', () => {
+describe('<BrandLogo />', () => {
   test('initially renders without crashing', () => {
     logoWrapper = mountWithContexts(
-      <TowerLogo />
+      <BrandLogo />
     );
     findChildren();
     expect(logoWrapper.length).toBe(1);
-    expect(towerLogoElem.length).toBe(1);
+    expect(brandLogoElem.length).toBe(1);
     expect(svgElem.length).toBe(1);
   });
 });

__tests__/pages/Login.test.jsx

@@ -63,8 +63,8 @@ describe('<Login />', () => {
     mountLogin();
     findChildren();
     expect(loginHeaderLogo.length).toBe(1);
-    expect(loginHeaderLogo.props().src).toBe('tower-logo-header.svg');
-    expect(loginHeaderLogo.props().alt).toBe('Ansible Tower');
+    expect(loginHeaderLogo.props().src).toBe('brand-logo.svg');
+    expect(loginHeaderLogo.props().alt).toBe('AWX');
   });
 
   test('state maps to un/pw input value props', () => {