Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Use constants for Functest config file"
  - Use constants for Functest config file

    env_file can't be defined in a config file simply because it's an
    entry point (Jenkins jobs, end users)

    Change-Id: Ie23c0ef90efc839d60f0f3a9754c58746b1f3a00
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 01b2806..d701e97 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 01b28068c727b54c34d5b20e3baad4c4e31d7761
+Subproject commit d701e9737f83ff29faba830df426b5a75c9746b1