Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - 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>
    (cherry picked from commit 98f3bf16722e5e718130f960910d64bc76951e3b)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index f86d8c7..b8fae66 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit f86d8c78c3f809a28f3e1feda7bbe778fca35d50
+Subproject commit b8fae660ba9c58307be9d7719caebe13f07eda08