Non-NPSP Package Rollups

[farahcharania]

Before the Non-NPSP Package goes live, it should include at least 2 core rollups and 1 formula field:
Total Fund Allocations
Total Fund Expenditures
And the sprint group recommends that the rollups are working before the package is released and it shouldn't be empty/coming-soon type of fields.
In addition to the two rollups, we also need to add a formula field that is the difference between total allocations and total expenditure.