Yong Tang 8e35845b73 Add .CreatedAt placeholder for docker network ls --format ...

This fix tries to add a placeholder `.CreatedAt` for Go
format template in `docker network ls --format`.

While working on 29226, I noticed that it is not possible to
display network's creation time in `docker network ls`, with or
without `--format`.

We are able to find the timestamp through `docker network inspect` though.

However, as we allows networks to be pruned based on the timestamp
(see 29226), showing the timestamp in `docker network ls --format`
would be much useful now.

This fix adds the `.CreatedAt` placeholder for `docker network ls --format`.
The default output was not changed for `docker network ls --format`.

A test case for unit tests has been added.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: e541799eed
Component: cli

2017-06-02 00:10:50 +00:00

components/cli

Add .CreatedAt placeholder for docker network ls --format

2017-06-02 00:10:50 +00:00

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