Description
想要在同一个node服务中针对不同路由规则渲染不同template模板（layout模板），于是创建两个createRenderer方法做缓存，但是只要有一个createRenderer 的执行后，另个一肯定会报错。如下：
renderer: TypeError: Cannot redefine property: $router at Function.defineProperty ()
0|pcsearch | at Function.X [as install] (server-bundle.js:2:142707)
0|pcsearch | at Function.Vue.use (/Users/yangjie/work/haodf/eureka/pcsearch/node_modules/vue/dist/vue.runtime.common.dev.js:5087:22)
0|pcsearch | at Object. (server-bundle.js:2:130989)
0|pcsearch | at n (server-bundle.js:2:124)
0|pcsearch | at Object. (server-bundle.js:2:111415)
0|pcsearch | at n (server-bundle.js:2:124)
0|pcsearch | at Object. (server-bundle.js:2:99009)
0|pcsearch | at n (server-bundle.js:2:124)
0|pcsearch | at Object. (server-bundle.js:2:98767)
0|pcsearch | at n (server-bundle.js:2:124)
0|pcsearch | at Object. (server-bundle.js:2:98461)
0|pcsearch | at n (server-bundle.js:2:124)
0|pcsearch | at server-bundle.js:2:1055
0|pcsearch | at Object. (server-bundle.js:2:1066)
0|pcsearch | at evaluateModule (/Users/yangjie/work/haodf/eureka/pcsearch/node_modules/vue-server-renderer/build.dev.js:9318:21)