This fix tries to fix 29667 where image's `CMD` is modified
after `WORKDIR` in Dockerfile.
The value of `b.runConfig.Cmd` was modified in the processing
of `WORKDIR`, in order to fix 28902. However, the same
`b.runConfig.Cmd` is passed to `commit()`.
This fix restored the `b.runConfig.Cmd` before `commit()`
the image for `WORKDIR`.
A test has been added.
This fix fixes 29667.
This fix is related to 28902, 28909, 28514.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: 083602384737635af9a89b75a6ca6d27f7515dc6
Component: engine
Yong Tang
4fcf2cd7b7