Fix generator bugs

[dmitri-mcguckin]

Problem Statement:

Theo and I discovered several bugs with the kaitai generator which caused incorrect packet parsing or straight-out crashing of the parser

Updates:

• AX25 Info payload would incorrectly read to the end of the packet
  • Disabling the CRC from being loaded
• Callsign processor type was set to non-existant repeater type instead of the satnogs recommended ror(1) (right-shifting the callsign bytestring)
• Add dynamic payload-size calculation while populating AX25 Info Data frame

Impact:

Kaitai struct is ready for release to SatNOGS DB + Network

[ThirteenFish]

For future reference It looks like we could have also removed the size field instead of calculating a fixed size, but that's not been tested and this has been.