Merge changes Iafa74463,I9701f2a9,I9715a489,Ia0c4e004,Ic8519e3b, ...

* changes:
  pdl: Add canonical tests for variable sized arrays
  pdl: Add canonical tests for body fields
  pdl: Add more byte element canonical tests
  pdl: Reorder canonical test files
  pdl: Derive big-endian test files automatically
  pdl: Add Packet_Reserved_Field canonical test