Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Add role to users created by rally if required

    It sets [openstack] keystone_default_role if NEW_USER_ROLE differs
    from member.

    Change-Id: Ib6be5cf22654e882ea110298cba421c1e87c78fd
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 95bd62a..98f3bf1 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 95bd62a751501caf0755e79e33de7a42f72deb27
+Subproject commit 98f3bf16722e5e718130f960910d64bc76951e3b