Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 845cdd2aa5d790e57b0b2999180df4abc6724bf1
  - Merge "Fix istio test scenario endpoint API validation"
  - Fix istio test scenario endpoint API validation

    Current query issued at the end of testcase to
    istio service API didn't validate the case, when
    http server responded with 5XX http code. By
    reusing common wrapper for cURL, this is now
    handled properly.

    Issue-ID: MULTICLOUD-686

    Signed-off-by: Konrad Bańka <k.banka@samsung.com>
    Change-Id: Ifb73494c9a6d98143edccaad095b2de5d456ef4f

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index a642f3b..845cdd2 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit a642f3becd14462123691a637a6fe4835a9b945e
+Subproject commit 845cdd2aa5d790e57b0b2999180df4abc6724bf1