Implement Update the progress of a settlement

[ggrg]

Goal:

As a core OSS team member
I want to adapt existing codebase
so that updateSettlementById resource is refactored to work with currency specific settlements

The story refers to OSS Settlement BRD, section 6.1.2.3 Updating the progress of a settlement

Tasks:

• Refactor for settlementContentAggregation and settlementWindowContent [@ggrg]
• Change swagger definition to cater for changed response (already applied by Change createSettlement API definition and validations #1096)
• Verify implementation result [@ggrg]
• Add QA notes to QA: Functional tests for "Settlement by Currency" feature: OTC-170 #1164 for functional testing
• Create follow-up story for unit tests coverage (updated Unit tests for central-settlement, part 2 #1171)

Acceptance Criteria:

• Created settlements can be successfully moved to settled state
• Designs are up-to date
• Unit Tests pass
• Integration Tests pass
• Code Style meets standards
• Coverage meets standards

Pull Requests:

• feature/1099 Update Settlement by ID Changes central-settlement#229

Follow-up:

• Request Settlement by Currency Wrap-up and QA #1100
• QA: Functional tests for "Settlement by Currency" feature: OTC-170 #1164
• Unit tests for central-settlement, part 2 #1171

Dependencies:

• Implement createSettlement DB inserts #1097

Accountability:

• Owner: @ggrg
• QA/Review: TBC