Update git submodules

* Update docs/submodules/openretriever from branch 'master'
  - deploy ovsdpdk by k8s

    Change-Id: Ie8ea880db410e699cdda147b304705819e13157a
    Signed-off-by: Guo Ruijing <ruijing.guo@intel.com>

diff --git a/docs/submodules/openretriever b/docs/submodules/openretriever
index dc766e6..79c38bf 160000 (submodule)
--- a/docs/submodules/openretriever
+++ b/docs/submodules/openretriever
@@ -1 +1 @@
-Subproject commit dc766e69c0c08c55b6df2384bbcfd1e712f03160
+Subproject commit 79c38bff1b279a6d73bbbffd98f44613d76afbfe