Use InMemoryEventBus as scoped and use InMemoryEventBus in integration tests#99

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anddrzejb:fix/use-mediator-as-scoped-and-use-inmemoryeventbus-in-integration-testsanddrzejb/evolutionary-architecture-by-example:fix/use-mediator-as-scoped-and-use-inmemoryeventbus-in-integration-testsCopy head branch name to clipboard