This patchset includes the go code for the Executor for the Bootstrap
container/Ephemeral cluster and respective unit test code.
This executor allows to deploy a K8S cluster on a public/private cloud
provider through a dedicated Bootstrap container.
This patchset does not include the manifests for the executor to avoid
too big patchset. It will be included in a different patchset.
Change-Id: I3f9d2ba1bb65b344522e105fd26310af24e3a1b1
4b31d3b936