slapos_subscription_request: Subscription Request uses simulation state rather them validation state

This value will be used to request among other things.

The Subscription Item is Hosting Subscription, so it only acts as a "requester".

The input should be parametrable via script. this is not ideal, however it allow up adapt the inputs and multiply certain entries based on the amount of requested instances.

This commit includes an example for KVM Cluster

To enable get/setTextContent

Use Grade System for classify the quality of the service

This is helpfull to not copy inside RSS entries which are not hosted by the existing website, like to inform news or major improvements or make announcements.

This were already been used in productions sites for a quite long time.

This is helpfull to not copy inside RSS entries which are not hosted by the existing website, like to inform news or major improvements or make announcements.

This were already been used in productions sites for a quite long time.