Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Add python3 for Functest utils"
  - Add python3 for Functest utils

    It also fixes test_utils RegexMatch and SubstrMatch.

    Change-Id: I124aa7d0c4110dcd2f50220aae7ba9b299799e93
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 9f41633..7109cd3 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 9f41633bed117341fe542433ea869bba14011e9f
+Subproject commit 7109cd3916fb120ae773e8ca79ececd449525fac