fixed and cleaning of the code according to the comment on the pull request
add of portStatus (and its dependency) roundtrip test
add more portDesc test
preliminary commit:
add of arbitrary module (and missing to_string fun) to:
Action
OfpMatch
FlowMod
Instruction
add some missing string ans
add to_string function to Action & Instruction module
add to_string to flowmod module
add test for instruction and flowmod
add size for roundtrip test + right ofset for the shift
add missing marshal case for oxm
add ofpMatch, oxm, and action test
add of missing parse case for oxm
add get_ofp_uint48_value (solve out of bound)
correct wrong offset (64-> 48)