Use Chromium-browser for rendering front-end tests

.travis.yml

@@ -5,6 +5,11 @@ git:
 
 language: node_js
 
+before_install:
+  - export CHROME_BIN=chromium-browser
+  - export DISPLAY=:99.0
+  - sh -e /etc/init.d/xvfb start
+
 install:
   - cd packages/strapi-mongoose
   - npm link

packages/strapi-generate-admin/files/admin/public/internals/testing/karma.conf.js

@@ -7,7 +7,7 @@ module.exports = (config) => {
     frameworks: ['mocha'],
     reporters: ['coverage', 'mocha'],
     browsers: process.env.TRAVIS // eslint-disable-line no-nested-ternary
-      ? ['ChromeTravis']
+      ? ['Chrome_travis_ci']
       : process.env.APPVEYOR
         ? ['IE'] : ['Chrome'],
 
@@ -42,7 +42,7 @@ module.exports = (config) => {
     },
 
     customLaunchers: {
-      ChromeTravis: {
+      Chrome_travis_ci: {
         base: 'Chrome',
         flags: ['--no-sandbox'],
       },