Calculate transaction amount based on fundDistribution percentage value

Purpose/Overview:
https://issues.folio.org/browse/MODORDERS-439?focusedCommentId=96661&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-96661

Requirements/Scope:
Encumbrance amount must be calculated based on corresponding fundDistribution value converted to percentage

Approach:
To calculate encumbrance amount for toFiscalYear based on encumbrance form fromFiscalYear:

• retrieve encumbrances from fromFiscalYear by sourcePoLineId
• calculate related fundDistribution percentage value: fundDistrValue= fromFiscalYearEncumbrance/sum(transactions.encmbrance.initialAmountEncumbered)
• calculate po line cost for toFiscalYear:
  • oldPoLineTotal = encumbraceRollover.basedOn == remaining ? sum(transactions.amount): sum(transactions.encumnrance.amountExpended)
  • newPoLineTotal = oldPoLineTotal + (encumbraceRollover.increasedBy * oldPoLineTotal/100)
• encumbrance amount for toFiscalYear = newPoLineTotal * fundDistrValue

Acceptance criteria:

• rollover script updated
• integration tests updated