Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Remove thirdparty-requirements.txt in smoke"
  - Remove thirdparty-requirements.txt in smoke

    As refstack must be installed via local dir (to sync requirements),
    it's useless to list it again in a requirements file.

    Change-Id: I9099fff185694fd41cf02e1265b1d4ab7659d7f2
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 116068e..3e2c8ed 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 116068e0f781d14507de05268ae5e232bc558f24
+Subproject commit 3e2c8edac0af2523bc941e2c7d7c55b040c4aeed