3.09 Implement the settlement API - 2

[elnyry-sam-k]

Goal:
As a Switch
I would like to have the settlement API implemented
so that the Settlement window query API is implemented as designed

Tasks:

• Implement settlements API - POST: /settlements - post settlement event trigger(6.2.1) [@vgenev]
  • Re-Align the response to the latest diagram [@vgenev @HenkKodde @rmothilal ]
• Implement settlements API - GET: getSettlementsByParams(6.2.2). [@bothadeon @vgenev]
  • Re-Align the response to the latest diagram [@ggrg]
• Implement settlements API - GET: getSettlementBySettlementParticipantAccount(6.2.3). [@HenkKodde @vgenev]
• Implement settlements API - GET: /settlements/{id}(6.2.4) [@bothadeon @vgenev @HenkKodde]
  • Re-Align the response to the latest diagram [@vgenev @HenkKodde]
• Implement settlements API - PUT: /settlements/{id} (6.2.5)[@bothadeon @vgenev @rmothilal @ggrg]
• Unit tests
• Integration tests
• Code coverage

Dependencies:

• 3.02 Design Settlement Window Closure API #327
• Preceded by 3.09 Implement the settlement API - 1 #348
• Follow-up story Unit tests for central-settlement - I #445

Accountability:

• Owner [@vgenev]
• QA/Review