Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Support py3 in uncovered packages

    It has to be noted that cloudify_rest_client doesn't support py3 then
    next unit tests vs cloudify-based testcases would be excluded.

    Change-Id: I0b0e64929d1238665c778ce51fd6abd5ccf06b6c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 09d6e6f..7f2d751 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 09d6e6feef33fa47bca440a096894b851b1ebca5
+Subproject commit 7f2d7515e068c2ba072d4f3b4cf0997e06ae8460