Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Increase Rally full criteria

    Even if several tests are currently under investigation, it seems
    relevant to expect a full success here.

    Change-Id: I6a8c5fb5a7dd4bfb5c3a2e7a93de1c0bec77c878
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 6461bda..3009b15 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 6461bda58e34626a2d36cb8e3480a0bf0390a96f
+Subproject commit 3009b15820e4eede5d52090146581c8aaf1eb0bc