Initial tentative 3

Everything is set for the REST Connector:
- Definition
- Implementation
- UTs
- Build
- All in one (no Maven repository in the project)
- Functional tests on the Studio 6.3.6
From a general stand point, name of tests should express what they are testing. Please provide better test name that document what is expected. So that when a test fails it is obvious what part of the behavior of the tested connector has been broken