We were creating the investments with more ballot counts first in every
test, so the tests would pass if we ordered the investments by creation
date instead of ordering them by the number of ballot lines.
Now factories define default headings for investments, so there's no
need to create a group and a heading to create an investment.
Likewise, in order to create a heading it isn't necessary to specify a
group anymore; specifying the budget is enough.
It's possible that there are more similar cases we haven't simplified
yet; I'm only addressing the obvious ones.
Why:
* We should recalculate winners also when an incompatible investment is flagged as compatible again
How:
* Removing the condition to recalculate that was checking only for a winner investment flagged as incompatible
* Extending the Budget::Result model spec to cover that new scenario
Why:
* A incompatible investment can't be chosen as a winner
* When a winner investment is marked as incompatible, winnersmust be recalculated and it can't be a winner
How:
* Increasing existing scenarios to include a incompatible investment
* Adding a new scenario where a winner investment gets flagged as incompatible
