Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Use timeout to wrap juju-wait

    It allows getting logs as releng doesn't push them if global timeout.

    Change-Id: I4bbb3818feff37d29b4ccd586f3e940380feef2e
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 251024b29199ecee86661b8850751d982b7c5797)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 78d628c..18b3dbc 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 78d628c929b02112dfb86dc9dfe9830ed1d5f975
+Subproject commit 18b3dbc1c3e9bc744507248b1f0a28f35652fc35