Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Allow adding a specific role to users created by tempest

    It may allow bypassing RBAC policies if required.

    Change-Id: I3b7ad44d7b80f8ea757846afdcd787b686c52856
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit ea596bbf094c8e45961b1b1379e58631942e4864)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 49573e3..59e08c4 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 49573e34fff7298605db07746add061ad3b1fff5
+Subproject commit 59e08c4315426edc1a50f2d476403becced765e9