Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Removing groups from ovs and deleting odl folder

    Change-Id: If9ceadfb363c37084f4cf907d7c7945061952ba1
    Signed-off-by: Nikolas Hermanns <nikolas.hermanns@ericsson.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index fbe6937..86e95e6 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit fbe69370c477a7b01032df701fe96ea90ec60341
+Subproject commit 86e95e61e419227b1b4c9abfa8fecf3066aa0e91