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 HIERARCHICAL SCHEDULER PATTERN
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Three periodic threads.
Two of them run in a partition and the third one 
in another partition.

The two levels of scheduling are defined according 
to the AADL ARINC 653 Annex recommandations:
- Virtual Processors are bound to the processor
- Virtual Processors may have different Scheduling_Protocols
- Processes are bound to Virtual processors (time partitions)
- Processes are bound to Memory subcomponents (space partitions)

Notes for analysis with AADL Inspector:
- The processor must have 'ARINC653' as Scheduling_Protocol
- A specific static analysis tool is available for ARINC 653