D2.7 OETCS API Requirements Version 1.2: Review: Diagnosis Interface missing

[UweSteinkeFromSiemens]

The API actually does not provide diagnosis functions. Therefore it must be extended by diagnosis functions like

• logging functions enabling the application software to write diagnosis information into a log file
• functions to observe the application software status (read status information provided for diagnosis purposes)
• read and write application sw data (write enabled only while in test mode)
• halt and resume functions for the application sw (enabled only while in test mode)

[UweSteinkeFromSiemens]

This issue is part of the review in #47 .