Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Revert "Stop rolling snaps (bypass bugfixes)"

    This reverts commit 5c6b1b4710f2a69f11a1ccb1c699f7c8c3616290.

    Change-Id: Ifcdf508f792741f947dee6c8eed1ff5dd57ab3cc
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index a9cd113..84a9f88 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit a9cd11304620c3810fb7849f5a606488e2479a12
+Subproject commit 84a9f88b4a5cd873387d267d592c5595daf07240