Issue #3194401: Switch to CircleCI as the default automated testing platform

.circleci/config.yml

@@ -18,8 +18,10 @@ jobs:
           MYSQL_DATABASE: test_varbase900xxc
           MYSQL_USER: user
           MYSQL_PASSWORD: passw0rd
+    working_directory: /project/docroot
     steps:
-      - checkout
+      - checkout:
+          path: /project
       ## Install PHP extra.
       - run:
           name: Install PHP extra

behat.varbase.yml

@@ -86,7 +86,7 @@ default:
               - "disable-infobars"
               - "js-flags=--expose-gc"
               - "no-sandbox"
-      base_url: 'http://127.0.0.1/docroot'
+      base_url: 'http://localhost:8000/docroot'
       # browser_name: 'firefox'
       browser_name: 'chrome'
       # browser_name: 'phantomjs'