Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Bypass Cloudify's upper-constraints issues

    It installs cmd2 via yum instead as last cmd2 release only supports
    python3.

    Change-Id: I495d71f11ed48ba47e1aa27965675d4bef7c141e
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 8b81b33530a9e46e7e6e7f8b81e752892bf9f2b9)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 84c775b..791b96e 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 84c775bc17ca5506929a81c3c0963e67e084aab5
+Subproject commit 791b96e549ec4d4dd3c87396ad56980ef8604b4d