- Previous method would have caused issues with the way tags are used
for filtering resources.
- Updated docs and comments to only refer to instance groups, rather
than all AWS resources
- --cloud-labels will be applied to every kops-created resource
- Also ran apimachinery to regenerated the conversions for the new
Cluster.ClusterLabels property.
This means it only needs to be specified during `kops create`. We
remove the option from `kops update` for consistency.
This will shortly be manageable using the secrets functionality.
Fix#221