Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Temporarily disable test_address_scope_rbac

    It will be safely reverted when it'is fixed in patrole [1].

    [1] https://review.openstack.org/#/c/612167/

    Change-Id: Ib072f833523456004b7f211ef951c4b053d82577
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 87f5db1..6939526 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 87f5db13d594075903face649f877478edb3b285
+Subproject commit 6939526b9802539a62f71ca7759f7bd49c16aef4