Update git submodules

* Update docs/submodules/sdnvpn from branch 'stable/fraser'
  - Fix version in setup.cfg

    It cannot be installed due the new branch.

    Change-Id: I1898190cbf522dbfbaeaa89e3d65a7b2e27fb2cc
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 785cd7b2bfd56a0f157898335a27ecf4ca9de782)

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index db5541b..a4324f3 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit db5541bb9fc1000ebec787b356bf7d6d26165bf6
+Subproject commit a4324f3d10e97321a1d6fd8b4ee1dcd48a912b7b