Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Fix _do_execute() return code in vping_ssh

    Change-Id: I781e51bb56f6cdac8b347e7fd85e70c07eb69e23
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 30e4106b56608595885e1b46ad4b668866ab9426)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index d988594..84c775b 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit d988594d88450d5bd579d503225ba6ec35492b9d
+Subproject commit 84c775bc17ca5506929a81c3c0963e67e084aab5