Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 57bfaca23061383d21bab87a91ac0202261b0a26
  - Update docker version
    
    Change docker version to fix kubespray issue
    
    Signed-off-by: Ritu Sood <ritu.sood@intel.com>
    Issue-ID: MULTICLOUD-1073
    Change-Id: I79571677f81efbb12a963b7527d918eddaf8db1f
    
1 file changed