chore: reorganize e2e test files (#5032)

* Renames the e2e test file to match the pattern of `{{component}}-e2e.spec.ts`.
* Flattens the directory structure in the `e2e` directory. Having a separate dir for each component was overkill since only have one file per component.
* Fixes some inconsistent code styles in the Protractor config.

Fixes #5030.

test/protractor.conf.js

@@ -10,7 +10,7 @@ require('ts-node').register({
 const E2E_BASE_URL = process.env['E2E_BASE_URL'] || 'http://localhost:4200';
 const config = {
   useAllAngular2AppRoots: true,
-  specs: [ path.join(__dirname, '../e2e/**/*.e2e.ts') ],
+  specs: [ path.join(__dirname, '../e2e/**/*.spec.ts') ],
   baseUrl: E2E_BASE_URL,
   allScriptsTimeout: 120000,
   getPageTimeout: 120000,
@@ -42,14 +42,14 @@ if (process.env['TRAVIS']) {
   config.capabilities = {
     'browserName': 'chrome',
     'version': 'latest',
-    "chromedriverVersion": "2.28",
+    'chromedriverVersion': '2.28',
     'tunnel-identifier': process.env['TRAVIS_JOB_ID'],
     'build': process.env['TRAVIS_JOB_ID'],
     'name': 'Material E2E Tests',
 
     // Enables concurrent testing in the Webdriver. Currently runs five e2e files in parallel.
-    maxInstances: 5,
-    shardTestFiles: true,
+    'maxInstances': 5,
+    'shardTestFiles': true,
 
     // By default Saucelabs tries to record the whole e2e run. This can slow down the builds.
     'recordVideo': false,