Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to c257a136355a794f5bf778f670c041e8958c3608
  - Adding cluster meta data and saving in etcd

    As part of this patch, we assign groupNumbers
    for the set of clusters which are under anyOf, or
    in other words are optional for deployement of
    app.
    Also refactored the instantiation flow by separating
    out the etcd interactions

    Issue-ID: MULTICLOUD-1064
    Signed-off-by: Rajamohan Raj <rajamohan.raj@intel.com>
    Change-Id: I21ece189daf6e6b3a7cfdba5df22d57b3d33ca78

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index 7959bd4..c257a13 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit 7959bd4c6fd403cf4ba58bf572b1259267b3c76d
+Subproject commit c257a136355a794f5bf778f670c041e8958c3608