Changes in the meta-model:
- remove ComponentInstance.id
- change OtherKnowledgeManagersAccess to KnowledgeManagersView
- have separate scheduling specifications for the member and the
coordinator (the main reason is to have separate triggers)

Further changes include separation of the the EnsembleTask into two (one
for a coordinator, another for all members). This is because they have
different scheduling. They will share a lot of implementation via some
abstract predecessor (the class for the predecessor is not in place
yet).