Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Fix rally cinder scenarios

    Remove network and servers context and set image and flavor as a
    scenario parameters.

    Change-Id: I5181ccce61c4f58af3737619d1b7d259cf539937
    Signed-off-by: Juha Kosonen <juha.kosonen@nokia.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 4d95f15..a9337bc 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 4d95f152cda9c7a44df13025341d3d7d472d57c6
+Subproject commit a9337bc5618bb90cd9502f1ec9dc409e18eae0f7