Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 7ff99668b98aae1210f72e84fcc1305814563600
  - Fix helm installation conflict

    Kubespray installs helm client on kubernetes master. The same client
    has to be installed on host running installation playbooks. In single
    node scenario, local host already has helm client installed by
    kubespray, thus leading to conflict due to way of provisioning.
    This helm installation has been moved to global configure playbook, as
    well as corrected, not to fail on single host deployments.

    Issue-ID: MULTICLOUD-690

    Signed-off-by: Konrad Bańka <k.banka@samsung.com>
    Change-Id: I1ef779ed0f2fde82758ce9e229c3f5bb015b2aeb

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index 8445148..7ff9966 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit 8445148cf095fcc55a9ada3e2bb0fece7a065089
+Subproject commit 7ff99668b98aae1210f72e84fcc1305814563600