Code review comment for ~xiaofengw/cloud-init:xiaofengw-post-script-bug-fix

> Hi, please rebase this branch to master, we've landed a fix for the CI
> failures
Hi Ryan,
I tried to rebase from master and found there is nothing to merge. Could you check? Thanks.

cc@Xiaofeng-UBUNTU1604-cloudInit:~/cloud-init-tmp/cloud-init$ git branch
* xiaofengw-post-script-bug-fix
cc@Xiaofeng-UBUNTU1604-cloudInit:~/cloud-init-tmp/cloud-init$ git remote add upstream https://git.launchpad.net/cloud-init
fatal: remote upstream already exists.
cc@Xiaofeng-UBUNTU1604-cloudInit:~/cloud-init-tmp/cloud-init$ git fetch upstream
cc@Xiaofeng-UBUNTU1604-cloudInit:~/cloud-init-tmp/cloud-init$ git rebase -i origin/master
Successfully rebased and updated refs/heads/xiaofengw-post-script-bug-fix.
cc@Xiaofeng-UBUNTU1604-cloudInit:~/cloud-init-tmp/cloud-init$ git status
On branch xiaofengw-post-script-bug-fix
Your branch is up-to-date with 'origin/xiaofengw-post-script-bug-fix'.
nothing to commit, working directory clean
cc@Xiaofeng-UBUNTU1604-cloudInit:~/cloud-init-tmp/cloud-init$