Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Remove tempest networking bgpvpn testcases

    JIRA: SDNVPN-230

    This patch removes networking bgpvpn testcases from sdnvpn project.
    The testcases from gambia release and up until now they run by
    functest project inside smoke container. There is no reason to run them
    inside features functest container any more.

    Change-Id: Iae031c17d15822358bfe21448c0d16fa14bc35de
    Signed-off-by: Stamatis Katsaounis <mokats@intracom-telecom.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index 46cb9e0..4d98432 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit 46cb9e081cb7cb64201d739f46cc1fc2fecf2a12
+Subproject commit 4d9843200ef1dde2442667cd077afb24f09087ba