Complete integration tests

[pabloitu]

Re-structure the integration tests so interfaces between floatcsep components are clearly defined. The following needs to be included:

• Experiment-ExperimentRegistry
• Experiment-Model
• Experiment-ResultsRegistry
• Evaluation-ResultsRegistry
• Experiment-Postprocessing modules
• Rename qa tests to end-to-end

[pabloitu]

Already addressed with #65