- Fix 4G and 5G discrepancy in TLV padding requirements: 4G does not
  need padding, whereas 5G needs, so make separate set of function for
  padding for NR
- Fix packing/unpacking for (n)FAPI PARAM and CONFIG.request/response
  messages
- Handle message padding to next 32-bit boundary, as per SCF
  specification in packing and unpacking functions
- Account for message header size upon receiving message in PNF and VNF