Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Remove dependence inet

    A new ubuntu image with quagga included was uploaded to
    artifacts.opnfv.org/sdnvpn/
    ubuntu-16.04-server-cloudimg-amd64-disk1.img

    Change-Id: I7e48ebbc2b00b7e771f43b26303acc66c2c48457
    Signed-off-by: Nikolas Hermanns <nikolas.hermanns@ericsson.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index 0d8f3bf..9e47ddb 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit 0d8f3bf930bdd945d34188fb591a6deb03a999c5
+Subproject commit 9e47ddb9739bb3e6b2ca91615c71bcd94c954172