Issue22 decouple tests

[Dongata]

Background

Every library should always have a unit test project, this means, that, when you ship a library this has a unit test that knows how to test it. So we separate the UnitTest project into two.

Changes done

• Removes UnitTest project
• Adds infrastucture.test project
• Adds domain.test project
• Updates Travis.Yml
• Updates namespaces

Pending to be done

• Add Api Test project
• Add Data Test project
• Add Integration Test project