A new Constant Bandwidth Server (CBS) version with reduced limitations.

[jollp]

RTEMS provides a version of the CBS scheduler which does not include the following features:

• Ability to attach more than one task to a Server;
• Budget ( allowed computation time ) replenishment when a task exceeded its previous budget;
• The served task is assigned with the ongoing server's priority.

This ticket presents a new CBS version where all the rules described by Abeni and Buttazzo are correctly implemented. This new version differs from the original CBS implementation on the following aspects:

1. A server can now serve several tasks;
2. When a served task exceeds its reserved capacity, its budget is replenished and the server's deadline updated and assigned as the new task priority;
3. The callback function is removed due to the modification performed on the CBS behavior when a served task exceeds its reserved computational time;
4. A task is killed when detached from a server since this new version only allows soft real-time tasks to run under Reservation-Based Context.

New Test Cases were developed and are directly included in the patch that will soon be attached.