[feat] GET /services/{service}/projections/{projection} implementation (2/2)

[lgrd]

Need

Code the GET /services/{service}/projections/{projection} route of the admin API. This is its second part : return the projection configuration when it is loaded.

Tasks

• [x] Be sure of the IO inside the API yaml
• [x] Code it. See next paragraph.
• [x] Update tests
  • [x] utest/itest if modification/Creation of a class
  • [x] rtest if modification of an API
• [x] Run tests
  • [x] Inside the docker provided by the project : rtest, ctest, utest, itest
  • [x] Manually if necessary
• [x] Update the documentation
  • [x] changelog.md
  • [x] documentation API

Code

• Update request and response classes if necessary
• Update the use of thoses classes
• Modify the projectionManager to store the configuration of each projection and return it when needed
• Update the service.computeProjectionRequest()