Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 42efc317925a12c22aa87ec715df61d339bd9347
  - Merge "Add readme.md for database shim layer"
  - Add readme.md for database shim layer

    Add some documentation related to how the mongo backend is
    implemented

    Issue-ID: MULTICLOUD-666
    Change-Id: I9dae429b1da004fbaa7ea694e6e58fa2d337a042
    Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index 58b8b2b..42efc31 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit 58b8b2b5fe958b1b21d24b605df49a42b67e94aa
+Subproject commit 42efc317925a12c22aa87ec715df61d339bd9347