Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Stop redefining $HOME"
  - Stop redefining $HOME

    Then .rally is located in the real home directory.

    Change-Id: I3e261d34a41a4105aef8fc0a996df501d638c030
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 6507787..30569ce 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 65077872cc6c8d4639a58d3f55bc473c1888311c
+Subproject commit 30569ceb06419dee62b8c2a25d589409397caf34