* Eden specific robot framework library, other small changes

* EdenTest library sends get requests
* A function in default controller to respond
* Template gets set in the setup (other variables can be set as per requirements)
i.e. when EdenTest calls get_settings, it must send an HTTP Authorization header with the admin credentials - and the get_settings function *must* require admin permissions. 

The check for permissions inside EdenTest is not enough - and in fact not needed at all. EdenTest/get_deployment_settings must send admin credentials, and default/get_settings must check these credentials (and raise 403 if they are missing) and require admin permissions (and raise a 401 if not authorized).

Obviously, default/get_settings can logout immediately afterwards - no need for any separate request from EdenTest to do so.