Code review comment for ~alexghiti/ubuntu/+source/libisoburn:int/alex/remove_libjte_dependency

Thanks, LGTM. All I did is splitting up the git commit history a bit, to have logical separated hunks:
- removal of dependency
- changelog update

Also, I mentioned the jigit MIR bug (LP: #1978066) in the changelog, without closing it, as this is the reason for this removal.