Add endpoint checker script

Created by: nicklangridge

Description

Selenium test script to check that all endpoint documentation examples load without error.

Use case

After setting up a REST server, run the script to check that all endpoints appear to be working.

Benefits

Helps to pick up obviously broken endpoints or missing documentation params. Useful when setting up the staging/test/live servers.

Possible Drawbacks

Can't think of any.

Testing

n/a

Changelog

n/a