Set up test environment

[MarcBehrens]

relates to issue #225

• [x] Decide on a c language based test definition on module level
• [ ] Decide on the interface to the design
• [x] write minimum test environment

[MarcBehrens]

Contributing to the prerequisite every information/test has to be available within SCADE for the designer the following decisions are taken:

• The first test definitions will be created in SCADE.
• Every test extension to SCADE has to provide sss scripts for the design to debug.

[MarcBehrens]

@janwelte contributing: Builds Test model (as SCADE State Machine) in combination with the toolbox for modul checks

• [x] Test model for BG Reception and Consistency
• [ ] Test model for Recognition of BGs in Train Position

Scond step could be to use first test models for RT-Tester based test generation

[janWelte]

First model is up and related to #261