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"

roles/uploads/vars/kube_versions.yml

@@ -1,17 +1 @@
-kube_checksum:
-    v1.2.2:
-        kube_apiserver: eb1bfd8b877052cbd1991b8c429a1d06661f4cb019905e20e128174f724e16de
-        kubectl: 473e6924569fba30d4a50cecdc2cae5f31d97d1f662463e85b74a472105dcff4
-    v1.2.3:
-        kube_apiserver_checksum: ebaeeeb72cb29b358337b330617a96355ff2d08a5a523fc1a81beba36cc9d6f9
-        kubectl_checksum: 394853edd409a721bcafe4f1360009ef9f845050719fe7d6fc7176f45cc92a8c
-    v1.2.4:
-        kube_apiserver: 6ac99b36b02968459e026fcfc234207c66064b5e11816b69dd8fc234b2ffec1e
-        kubectl: dac61fbd506f7a17540feca691cd8a9d9d628d59661eebce788a50511f578897
-    v1.2.5:
-        kube_apiserver: fbe8296ad4b194c06f6802a126d35cd2887dc1aded308d4da2b580f270412b33
-        kubectl: 5526a496a84701015485e32c86486e2f23599f7a865164f546e619c6a62f7f19
-    v1.3.0:
-        kube_apiserver: 431cd312984a29f45590138e990d5c4d537b069b71f2587a72414fabc4fcffdd
-        kubectl: f40b2d0ff33984e663a0dea4916f1cb9041abecc09b11f9372cdb8049ded95dc
 kube_version: v1.3.0