Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Unlink robotframework from constants

    Change-Id: Ic2c6c84c3824ec3fa208824ae67f1769d4e18c4f
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 0bead15..a62ed36 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 0bead15943852cb018a83832e9a76c7e87c71ab7
+Subproject commit a62ed36ae05c7ca64c3d4aba2702820e268fc8f1