Disable commit on JLD2 backend

Error when the backend tries to store structs into JLD2 files. This shouldn't happen anyway but new models with incomplete export macros sometimes do this.

This can be disabled by passing disable_commit=false to dfopen.

This MR also adds tests , Aqua tests, and changes some basic stuff to make tests pass. (Left-over dependency InteractiveUtils & removes 2 deprecations that were already deprecated when InPartS was moved over from the old repository)