Update git submodules

Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to f006c55c0793a0cacac5aa45ba7f13fd5c6ef5f4
  - Fixing kubectl conflict on KUD addons

    Removing kubectl (andrewrothstein.kubectl) dependency
    that conflicts with kubectl installed by Kupespray.

    Copy kubectl installed by Kubespray also to host
    running Ansible.
    That needs kubectl_localhost: true in Kubespray configuration
    to make it copy binary to localhost.

    Issue-ID: MULTICLOUD-667

    Change-Id: I8c5f56488a9f559c4358cea5ad56fa23b26ec6aa
    Signed-off-by: Samuli Silvius <s.silvius@partner.samsung.com>