Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Merge "Updated from global requirements"
  - Updated from global requirements

    Change-Id: I2dd50c10be5d1c1a845292d2c637d721ca6cfa4b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index 9c5b191..9a70aca 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit 9c5b191165018cd43f7acb076903619f4681ce23
+Subproject commit 9a70acabe83d10fd1ac1b0de5b7ce480929b55e7