BBSIM OMCI insertion of unknown attribute in some MibUpload ME

OnuAdapter introduces OMCI lib with relaxed decoding functionality, which should be verified in respect of not stopping the overall processing when encountering some (yet) unknown attribute.
In order to provide an according test constellation BBSIM should insert some undefined attribute mask indication with some arbitrary attribute value in the MibUploadResponse data, e.g. for ONU2-G ME. Furthermore (more an additional option) an alarm should be generated that also includes a not specified alarm bit, e.g for the PPTPEthIf alarm (this bit should thene.g. always be set in case the LOS alarm is generated).
The additional unknown attribute/alarm setting should be activated on a specific configure option, so that it can be adjusted from robot on BBSIM installation.
As OMCI encoding may be difficult for unknown attributes it might perhaps be required to send this frame as raw byte slice (with some partly hard-coded definition).