Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Clean all possible resources

    It checks all openstack resources before cleaning.
    It allows removing images even if the test fail quickly.

    Change-Id: I1763b8a70fa7ffeb03c435e8e775c7afd1a7adac
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 6166caffe31888ef237874fdcaf088ac4ff8d003)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 01360bc..d8a6342 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 01360bc0547f223689b86a9b25ff89ca0cb4719a
+Subproject commit d8a6342c5fa1c17d7454e245626ed745612d841a