Improve support for placementStrategy and placementConstraints

[efeller]

We are trying to use placementStrategy field in dockerOptions and it does not seem to work. No problems in the build:

https://app.shippable.com/github/zenreach/jobs/sightings-zp-phantom/builds/5b280a17fbb9510700f4ce9e/console

However, the resulting service on AWS ECS does not have a task placement strategy set. Under the deployments section it simply says:

Strategy No strategies

[efeller]

This might be working. However, it needs a destroy of the job on ECS and a redeploy via shippable with a reset. Can you please fix it such that I can add placementStrategy without a job delete and redeploy?

Thanks

[trriplejay]

@efeller yeah, this is the behavior of ECS itself. Internally, we would still have to delete/redeploy the service. Is that the behavior you would want? (similar to what happens when changing a load balancer)

[efeller]

@trriplejay Yea, it would be fine if shippable did the delete/redeploy for me. Thanks.