fix(create, get): handle comment to ontology (DEV-1852)

[jnussbaum]

resolves DEV-1852

[linear]

DEV-1852 DSP-TOOLS: comment to ontology behaves buggy

State as is

The get command writes the comment of an ontology into the field "comment", which is correct but undocumented.

The create command ignores the comment entirely.

The schema file disallows the "comment" field, but allows a "comments" object with multi-language support, which is not possible to have on a DSP server.

State to be

The get command can stay as it is, except that the fields of the ontology object should be reordered (move "comment" further up)

The create command should learn to use the "comment" field.

The schema should allow "comment" as single string but disallow "comments" as multi-language object