Update git submodules

* Update docs/submodules/stor4nfv from branch 'master'
  - Remove functest_kubernetes from requirements

    Change-Id: I05dd6f833716e36d173f0b4e7f6a317d41f1a039
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/stor4nfv b/docs/submodules/stor4nfv
index a0d67ad..fcedde9 160000 (submodule)
--- a/docs/submodules/stor4nfv
+++ b/docs/submodules/stor4nfv
@@ -1 +1 @@
-Subproject commit a0d67adf3f8c6f2a869fd2440c0b862860e1479d
+Subproject commit fcedde93eb366867ed428d362e2cb8a6b7f28b3c