Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Enable sdnvpn (Gambia Release)

    sdnvpn has been synced to OpenStack Queens [1].

    [1] https://gerrit.opnfv.org/gerrit/#/c/55531/

    Change-Id: I468752394da12023083d83f92c91b09ecf964a26
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 920e8d3..694f7a7 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 920e8d3cd4386e4d9085b5557b0c381d5f043830
+Subproject commit 694f7a7274bd2b909394bbbb22e47d09937d26a7