Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Merge "Leverage on SDN_CONTROLLER_IP if fuel" into stable/fraser
  - Leverage on SDN_CONTROLLER_IP if fuel

    It conforms with [1].

    [1] https://jira.opnfv.org/browse/FUEL-352

    Change-Id: Idae142de8de09203509c73c35c2e7fea5a5d880b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 492b5543103a25b51740b82a291b087f68d932eb)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 1ea1acc..959d1ef 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 1ea1acc52de313eebb4cecd250f6a2b93fd628f5
+Subproject commit 959d1efba009080f7fdbf5efe2a2b16c7ccfa6dc