Add logging and better templating to kubectl step

[dexhorthy]

What I Did

Add logging and full templating to kubectl step

How I Did it

• lots of debug logging
• use a FullBuilder instead of a BaseBuilder so we can access ConfigOptions
• use the builtPath instead of step.Path
• handle builder.BuildString() errors
• refactored out the cmd preparation into a separate method, (in a separate commit )

How to verify it

• tailf .ship/debug.log
• Use a ConfigOption in the kubeconfig path template:

 - kubectlApply:
     path: base/
     kubeconfig: '{{repl GoogleGKE (ConfigOption "gcp_cluster_name")}}'

Description for the Changelog

Add logging and full templating to kubectl step

Picture of a Boat (not required but encouraged)

⛵

[codeclimate]

Method DaemonlessKubectl.prepareCmd has 6 return statements (exceeds 4 allowed).

[dexhorthy]

ehhhhh I think I'm okay with this one