Switch profile validation on by default

[cmungall]

But may have to wait for:

https://github.com/ontodev/robot/issues/1040

OR: validate-profile is performed on the end product, after missing declarations are injected

[cmungall]

I just found this line:

https://github.com/INCATools/ontology-development-kit/blob/efa8d96d92238a88b7d202457edd370ac8732574/template/src/ontology/Makefile.jinja2#L168

The message is a bit misleading: conversion to functional syntax is irrelevant, no? It's the merge step that repairs

[matentzn]

You are right, I never realised it was the merge step. convert -f ofn works as well (w/o merge) but merge is probably the better thing to do here. we can at least fix the comment

[anitacaron]

The profile validation is already on as default (commit), it's part of the test pipeline.

I'll fix the comment.