Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Clone rally-openstack in functest-smoke

    It allows getting latest changes verifying Gnocchi.
    Former neutron tempest tests are also removed.

    Change-Id: I5910ca012b72b1c5bfb9b0f52591cc9e03051f47
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index b5a9b04..02ce0a2 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit b5a9b04871868633f5c92005b7665bfb76ee6eec
+Subproject commit 02ce0a217bc1865454c9c93326701290442788c5