Ryu update

Try updating the ryu to the newest version.

Question:
Why do the commits which are already in the master branch of att/ryu appear in this pull request again? (The last three commits in this pull request.)

What I did:
git clone att/ryu
git pull --rebase osrg/ryu
git checkout -b working
git rebase master
git push -f powerist working
pull request

Was there something wrong with the above sequence of commands?