Improved integration tests

[jycr]

Currently, integration can be made with Docker (cf. docker-compose.yml and tool_docker-*.sh).
These prerequisites can be complex to implement in certain dev environments (e.g. compagny context)

We can add some tools based on com.sonar.orchestrator.Orchestrator to simplify those steps and to automate Integration Test in Maven Build.

We can draw inspiration from what is done in SonarSource/sonar-java plugin

We need to restructure the project tree to include the test project in a dedicated sub-module.
it would also be preferable to include by default an "ecoCode" quality profile bringing together all the ecoCode rules.