io_pre_created_handle_states does not belong to registry

Defined here:

Line 605 in 6ac2a9b

    
           DefinitionHolder<otf2::definition::io_pre_created_handle_state> io_pre_created_handle_states_;

This definition is like a property. There is no reference to it.

Note: Things like that would be easier to catch when using more generic methods and explicitly defining the properties of definitions like "id space" with no specialization when they don't have one. See e.g. #32, #34. It would also be solved by using otf2-template, see #33

Fixed in b5f1761