Update git submodules

* Update docs/submodules/stor4nfv from branch 'master'
  - Add k8s test case

    Change-Id: I7ef6fd6aa31fae47cca446d31b6b54d13454df9c
    Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>

diff --git a/docs/submodules/stor4nfv b/docs/submodules/stor4nfv
index 80a8551..a0d67ad 160000 (submodule)
--- a/docs/submodules/stor4nfv
+++ b/docs/submodules/stor4nfv
@@ -1 +1 @@
-Subproject commit 80a855170e1488eeb8cc0833ffba2b1938c327ac
+Subproject commit a0d67adf3f8c6f2a869fd2440c0b862860e1479d