Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Update promise upper constraint"
  - Update promise upper constraint

    It follows "Move promise package to root directory" [1].
    Then it allows installing promise in editable mode.

    [1] https://gerrit.opnfv.org/gerrit/#/c/39161/

    Change-Id: Id51d934c18a8f6567195de6b7775a62452bb9f83
    Depends-On: Ia9ae55b127d0d324d97974f5e9b1923d7636d7cd
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index fbdbdc0..ad122e8 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit fbdbdc076ba233e1add79a48616444116231ec4a
+Subproject commit ad122e8a1020a1b6d9ed33df2fd25c3504f84188