CLI 2.2.X create the module.ts files 
And I created an upgrade guide for Ionic 3.0 Guide: How to update to Ionic 3.X
At the end, you find the lazy loading instructions: https://docs.google.com/document/d/1vGokwMXPQItZmTHZQbTO4qwj_SQymFhRS_nJmiH0K3w/edit