Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Precise vyos_vrouter logs

    Aborting was written even if it worked after rebooting the vm [1].

    [1] https://build.opnfv.org/ci/view/functest/job/functest-daisy-baremetal-daily-master/41/console

    Change-Id: Idb29624b8793df5d77d401b375aa3b3176778ddf
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 6108496..99b72c3 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 6108496e34d3b875d99cfbb67bd93e32a9b406ec
+Subproject commit 99b72c34e92c567a47ebc3b977c7aaa290fef6de