Update git submodules

* Update docs/submodules/stor4nfv from branch 'master'
  - update k8-nosdn-stor4nfv-ha scenario documentation

    Change-Id: Iea38168d2819cbbedcfcc799dfd93840aaf53d4a
    Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>

diff --git a/docs/submodules/stor4nfv b/docs/submodules/stor4nfv
index 12234e8..6ed3685 160000 (submodule)
--- a/docs/submodules/stor4nfv
+++ b/docs/submodules/stor4nfv
@@ -1 +1 @@
-Subproject commit 12234e85d8b07e17296ba48329e287cf354c151a
+Subproject commit 6ed368563ae3244594da858974e5c6924ece3a95