As https-only becomes default, tests are adapted in order to follow new
approach, case by case, or the redirect http->https is asserted, or https
access is used instead of http.

This is required for Python 3.7

- move or link instead of copying
- don't set too open permissions

See merge request !747

   This would allow the webrunner invoke it to bootstrap the instance
   rather them create the folders manually.

  Creating this file and updating the slapos.cfg configuration
  is possible to call slapos node format from the partition in the
  same way you would do in a computer.