Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Update framework pres

    It takes into account the next framework modifications:
      - Switch TestCase attribute criteria to result [1]
      - Manage criteria in TestCase [2]
      - Print the real testcase duration [3]
      - Rename TestCase check_result() to is_successful() [4]

    [1] https://gerrit.opnfv.org/gerrit/#/c/33695/
    [2] https://gerrit.opnfv.org/gerrit/#/c/33697/
    [3] https://gerrit.opnfv.org/gerrit/#/c/34369/
    [4] https://gerrit.opnfv.org/gerrit/#/c/34373/

    Change-Id: I3a6790e4233ef4c55b0535618dacf702f779f28b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 3218f1f..5a9e8f0 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 3218f1fa1d7bb265f3b5c50e0853a00446ac2e93
+Subproject commit 5a9e8f0924daf487c872aab077400df70451813e