Update git submodules

* Update docs/submodules/functest from branch 'master'
  - 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>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 30e4106..8b81b33 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 30e4106b56608595885e1b46ad4b668866ab9426
+Subproject commit 8b81b33530a9e46e7e6e7f8b81e752892bf9f2b9