Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Merge "Removing inactive committers in accordance with Section 8 of the TSC charter."
  - Removing inactive committers in accordance with Section 8 of the TSC charter.

    Change-Id: I32a2f340a6f9a5966ed52e2d6d6e8fe62cc6338a
    Signed-off-by: Tim Irnich <tim.irnich@ericsson.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index d94269b..8b31653 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit d94269b2189405e854aeb6d21e476206a0b3d701
+Subproject commit 8b31653352a27e1dc9495d6f19b25849ffbbda1b