Docs for "ecs_service" do not cover non 'default' ecs cluster

[MarkWoods1977]

When using the ecs_service resource described here https://github.com/k1LoW/awspec/blob/master/doc/_resource_types/ecs_service.md, when the cluster is not default it will fail.

e.g.

describe ecs_service('my-ecs-service') do
  it { should exist }
end

fails with

Aws::ECS::Errors::ClusterNotFoundException:
       Cluster not found.

Where the cluster is not default you need to pass the cluster name e.g. for cluster named 'non-default':

describe ecs_service('my-ecs-service'), cluster: 'not-default' do
it { should exist }
end

Could the docs in the link be updated accordingly.

[Ken’ichiro Oyama]

@MarkWoods1977 Thank you for your report !!