Setup Duniter-Mock usage in tests and CI

• https://forum.duniter.org/t/duniter-mock-easy-start-your-v2s-dev-stack/13498
• https://git.duniter.org/tools/duniter-mocks

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Implement tests

• replace all manual mocking with duniter-mocks?
• implement additional separate tests (located in a separate directory) with duniter-mocks?

Write tests scenarios to test life-cycles

• identity creation: creation, certifications, membership
• money transfer, balance, history, claim ud
• smith

Set up CI

• Adapt container(s): clone duniter-mocks, set-up env (./run.sh generate, install)
• In Silkaj CI
  • Generate config: ./run.sh generate custom_config.json or local.json
  • Spin-up containers ./run.sh start
  • Run tests
  • Stop containers?