Move initOAuth attacher out of core constructor

src/core/index.js

@@ -104,8 +104,6 @@ module.exports = function SwaggerUI(opts) {
 
   var system = store.getSystem()
 
-  system.initOAuth = system.authActions.configureAuth
-
   const downloadSpec = (fetchedConfig) => {
     if(typeof constructorConfig !== "object") {
       return system

src/core/plugins/auth/index.js

@@ -5,6 +5,9 @@ import * as specWrapActionReplacements from "./spec-wrap-actions"
 
 export default function() {
   return {
+    afterLoad(system) {
+      system.initOAuth = system.authActions.configureAuth
+    },
     statePlugins: {
       auth: {
         reducers,