Document ExaminationRegulation Connection for hlf-scala-api

[NikoBergemann]

• copy old doc
• adjust to actual connection methods

[RBeierling]

changed back to In Porgress because the vue-lagom api has changed and some of the calls are better handled by Hyperledger.

--> active flag in parameter (should be renamed to isActive)
--> active flag in model (should be renamed to isActive)
--> additional calls have to be handled