Added missing global sum for FIP totals.
I missed this in PR #1001
thanks. in flow_ebos you do not need to resort to the `parallelISTLInformation` but you can also use `grid_.comm()` because the grid is always a Dune grid. do you want to have it merged as-is or do you prefer to change this?
I'd like to keep it as is for now, for commonality between the ebos-legacy codes. Eventually we might do a refactoring of this, sounds like it could be a big simplification at some point.
Why is `grid_.comm()` any simpler than `pinfo.communicator()`?