Move examples into folder named after command

Move the example YAML files into a folder named after the command that
they are used for, in this case 'vcloud-configure-edge'.

This is for consistency with the other vCloud Tools[1][2].

[1]: https://github.com/alphagov/vcloud-launcher/tree/master/examples
[2]:
https://github.com/alphagov/vcloud-net_launcher/tree/master/examples