Provide expense class details in Ledger Rollover Budgets API response

Purpose/Overview:
Run preview ledger rollover and store result budgets and errors of process

Requirements/Scope:

1. Provide existing Rollover Budgets API with new fields represented expense classes details
2. Cover extended API with Karate tests

Fields that should be added to reponse:

Note: Fields Awaiting payment, Expended, Percentage of total expended can be omitted if they generation requires big effort from implementation perspective

Approach:

1. Modify rollover script to save expense classes details into new temp table
2. Create new sql function that accepts data from expense_classes and encumbered_transactions temp table and provide expense class details as result
3. Move some logic from finance-storage module connected with calculation expense classes details using Java Money API
4. Update rollover budgets with new expense classes details in Rollover service 

Rollover Budget Schema already has expenseClass details object inside that canbe used: https://github.com/folio-org/acq-models/blob/master/mod-finance/schemas/ledger_fiscal_year_rollover_budget.json 

Acceptance criteria:

• API extended with expense class details
• Unit tests added
• API integration tests adjusted