fix(ecs): When in "host" network mode, host and container port should match.

[justinrlee]

When creating a task definition with the host network mode and specifying a containerPort, the containerPort should be used for both the host and container port.

Can be cherry-picked into 1.14.

[spinnakerbot]

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• 023ca56: Merge pull request Kato clouddriver rebase #2 from spinnaker/master

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