Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fix a typo in docstring"
  - Fix a typo in docstring

    Change-Id: I4826240a56141771df202b9b3b416d64d2db2cf4
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 1825aa7..2db6217 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 1825aa713952288e4204ea3b38f0d3c0635a6918
+Subproject commit 2db621767d66b632fab4e2594e4524348484ad56