Some astrocytes are classified as neurons

[dosumis]

These cells should not be under neuron. This is inferred from 'has soma location', which has domain 'neuron', substitute it with 'part of' some { insert some location in the nervous system }

also make neuron and glial cell disjoint axiom after the fix is done.

(@AvolaAmg - apologies if duplicate. Stumbled across it again and just want to make sure it's fixed ASAP)

Originally discussed on #2348 (comment)