Use CJS in environments service

app/assets/javascripts/environments/components/environment.js.es6

@@ -5,7 +5,7 @@
 
 window.Vue = require('vue');
 window.Vue.use(require('vue-resource'));
-require('../services/environments_service');
+const EnvironmentsService = require('../services/environments_service');
 require('./environment_item');
 const Store = require('../stores/environments_store');
 
@@ -68,11 +68,11 @@ const Store = require('../stores/environments_store');
       const scope = this.$options.getQueryParameter('scope') || this.visibility;
       const endpoint = `${this.endpoint}?scope=${scope}`;
 
-      gl.environmentsService = new EnvironmentsService(endpoint);
+      const service = new EnvironmentsService(endpoint);
 
       this.isLoading = true;
 
-      return gl.environmentsService.all()
+      return service.all()
         .then(resp => resp.json())
         .then((json) => {
           this.store.storeAvailableCount(json.available_count);

app/assets/javascripts/environments/services/environments_service.js.es6

-/* globals Vue */
-/* eslint-disable no-unused-vars, no-param-reassign */
+const Vue = window.Vue = require('vue');
 
 class EnvironmentsService {
-
-  constructor(root) {
-    Vue.http.options.root = root;
-
-    this.environments = Vue.resource(root);
-
-    Vue.http.interceptors.push((request, next) => {
-      // needed in order to not break the tests.
-      if ($.rails) {
-        request.headers['X-CSRF-Token'] = $.rails.csrfToken();
-      }
-      next();
-    });
+  constructor(endpoint) {
+    this.environments = Vue.resource(endpoint);
   }
 
   all() {
@@ -22,4 +10,4 @@ class EnvironmentsService {
   }
 }
 
-window.EnvironmentsService = EnvironmentsService;
+module.exports = EnvironmentsService;