refactor e2e test scripts

test/e2e-tooling/server.js

@@ -0,0 +1,17 @@
+module.exports = { getServer };
+
+const configs = {
+  local: {
+    host: 'localhost',
+    port: 4723
+  },
+  saucelabs: {
+    host: 'ondemand.saucelabs.com',
+    port: 80,
+    auth: process.env.SAUCE_USERNAME + ":" + process.env.SAUCE_ACCESS_KEY
+  }
+}
+
+function getServer(environment) {
+  return configs[environment.toLowerCase()];
+}