Service specific updates for /v1/relay-server-replacement

[IswaryaaS]

Apart from general changes, there are some specific updates for /v1/relay-server-replacement

• [x] Replace set of attributes in request-body with new set of attributes (in all testcases)
  • current-application-name
  • current-release-number
  • future-application-name
  • future-release-number
  • future-protocol
  • future-address
  • future-port

    Acceptance:

• [x] Attribute correctness
  • [x] Change testcase for old-application-release-number to current-release-number
  • [x] Add testcase for future-release-number
  • [x] Change testcases for new-application-address to future-address
  • [x] Change testcases for new-application-port to future-port