Update Budget schema with new Financial information

Purpose/Overview:
In order to support UIF-261

Requirements/Scope:

1. Addition set of fields need to be added.

Approach:

Financial information

Update schema mod-finance/schemas/budget.json with new fields:

1. allocated(readOnly) - initialAllocation + allocationTo + allocationFrom
2. initialAllocation(persistent) - The amount of the first allocation made to this budget
3. allocationTo(persistent) - The sum of all allocation transaction amounts made TO this budget not including the Initial allocation
4. allocationFrom(persistent) - The sum of all allocation transaction amounts made FROM this budget not including the Initial allocation

Update schema mod-finance/schemas/shared_budget.json with new fields:
1. Remove extends from budget

1. allocated(persistent) - as we recieved from UI SharedBudget and can allocate money in creation time, then allocated need to be serializable.
   At the same time "allocated" will not be stored in database
2. initialAllocation(readOnly) - The amount of the first allocation made to this budget
3. allocationTo(readOnly) - The sum of all allocation transaction amounts made TO this budget not including the Initial allocation
4. allocationFrom(readOnly) - The sum of all allocation transaction amounts made FROM this budget not including the Initial allocation
5. totalFunding(readOnly) - budget.allocated + budget.netTransfers
6. cashBalance(readOnly) - Total Funding minus Expended
7. availableBalance(readOnly) - Total Funding minus Unavailable

Acceptance criteria:

• Schema updated