Update git submodules

Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 048bfa9ec8e815369666eec6e662af3b0cb2e3cb
  - Merge "Starting of k8splugin with docker-compose is broken"
  - Starting of k8splugin with docker-compose is broken

    docker-compose.yml and start.sh script cannot be used
    in installer.sh to start k8splugin and mongo.

    This commit modifies start.sh script to be usable in
    installer.sh to start plugin before tests.

    Also fixed kud_tests variable in installer.sh.

    Issue-ID: MULTICLOUD-640

    Change-Id: I60cc850d6f5b58df574f79ad3c65b801c59b3a14
    Signed-off-by: Samuli Silvius <s.silvius@partner.samsung.com>