The -f flag on docker tag has been deprecated in docker 1.10 and
is expected to be removed in docker 1.12.
This fix removed the -f flag on docker tag and also updated
deprecated.md.
NOTE: A separate pull request for engine-api has been opened to
cover the related changes.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: 4a87769a80
Component: cli