Strip unwanted headers from Ieee1609Dot2 data frames

[dmccoystephenson]

Problem

The SCMS files for this project were recently updated and headers started being added to messages during the encoding process for ASD payloads, even with unsigned TIMs. This causes problems when OBUs attempt to process the message.

Solution

Any hex before '001F' that is found in an encoded Ieee1609Dot2 data frame is now stripped.

Testing

• The unit tests have been verified to pass with these changes.
• This was tested locally using docker compose. ASD payloads, when decoded, were found to no longer include the header.
• This has been deployed to CDOT's dev environment. Deposits made to the SDX, when retrieved via the GetDataByRecordId endpoint, were found to no longer include the header.
• It should be noted that this has only been tested with signing disabled. We may want to perform further testing in an environment with signing enabled.