Copy kubectl from docker container

Nearly the last stage of source all components to containers.
Kubectl will be called from hyperkube image.

Remaining tasks:
 * Move kube_version variable to kubernetes/preinstall
 * Drop placeholder download.nothing requirement

roles/uploads/defaults/main.yml

@@ -10,7 +10,6 @@ calico_cni_version: v1.3.1
 weave_version: v1.5.0
 
 # Download URL's
-kube_download_url: "https://storage.googleapis.com/kubernetes-release/release/{{ kube_version }}/bin/linux/amd64"
 etcd_download_url: "https://github.com/coreos/etcd/releases/download/{{ etcd_version }}/etcd-{{ etcd_version }}-linux-amd64.tar.gz"
 calico_cni_download_url: "https://github.com/projectcalico/calico-cni/releases/download/{{calico_cni_version}}/calico"
 calico_cni_ipam_download_url: "https://github.com/projectcalico/calico-cni/releases/download/{{calico_cni_version}}/calico-ipam"
@@ -59,12 +58,3 @@ downloads:
     unarchive: true
     owner: "etcd"
     mode: "0755"
-
-  - name: kubernetes-kubectl
-    dest: kubernetes/bin/kubectl
-    version: "{{kube_version}}"
-    sha256: "{{vars['kube_checksum'][kube_version]['kubectl']}}"
-    source_url: "{{ kube_download_url }}/kubectl"
-    url: "{{ kube_download_url }}/kubectl"
-    owner: "kube"
-    mode: "0755"