of-wire json test: expected results
of-wire json test: a program to generate test data for unit tests
of-wire json test: change the of_protocol upstream

for now, use my fork of of_protocol, which contains necessary
fixes for our purpose.

this commit is separated from the rest of mkdata so that
it can be easily reverted when the upstream took the necessary
changes.
of-wire json test: generated data for unit test
of-wire json test: unit test