- Provides source and target entity types for a given AllocationEntry specialization
- Used to decouple plugins providing specializes source/target entity types from plugins providing AllocationEntry specialization. Example: Specify that a 'Core' or a 'GenericExecutionUnit' can be used in a PartitionToExecutionUnitAllocationTable
- UI: Add ComboBoxes to select source/target entity type if there is more than one

Generalize <Partition,Core> allocation (defined in org.fortiss.af3.platform.hierarchic) to <Partition,ExecutionUnit> allocation (defined in org.fortiss.af3.partition)
refs 2950