This fix tries to address the issue in 26173 where `docker import -c`
with quoted flags returns an error.
The issue was that in `api/client/image/import.go` the flag
`--change/-c` was handled by `StringSliceVarP` which does not handle
the quote well.
The similiar issue was enountered for 23309 (`docker commit`).
This fix takes the same approach as 23309 where `StringSliceVarP`
was replaced with `VarP` and `opts.ListOpts`.
An integration test has been added to cover the changes.
This fix fixes 26173.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: a79a27412d721a042ae96b411ab1b5b926a7d28a
Component: engine
e2707394d0