Just for testing

- on a page where the session expiry is implemented type: expire123
- this will reset the timer down to 15sec to appear and 1:30m to count down
- refresh the page to clear
remove cheet.js form package.json

- this is easier to remove once we need to
removed cheetjs

- going to trigger this using a bookmark
- have to expose the module on the window
Merge pull request #386 from ministryofjustice/feature/konami-code-expire

Just for testing/ Konami code for session expiry reset