Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Conform the RefStack testcase with the Rally context"
  - Conform the RefStack testcase with the Rally context

    If the RefStack testcase relies on the Tempest configuration
    generated by Rally, it must conforms with the related context [1].

    [1] https://raw.githubusercontent.com/openstack/rally/0.9.1/rally/plugins/openstack/verification/tempest/context.py

    Change-Id: Ia62c0a328c53a1541aeaf8668e1f34ae67898eed
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index d39bd66..6da0914 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit d39bd66631548b4e13ecff738bff682b455c6d2e
+Subproject commit 6da0914b3f1cb4d146e50d748700ac047a8a9f2c