Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Disable Glance API v1

    It has been deprecated since Newton [1].
    Even if the related tests are skipped in latest tempest [2], API v1
    has to be disabled in Gambia's tempest.conf [3].

    [1] https://docs.openstack.org/glance/latest/user/glanceapi.html
    [2] https://artifacts.opnfv.org/logs/functest/lf-pod1/2018-10-22_02-34-24/tempest_full/tempest-report.html
    [3] https://artifacts.opnfv.org/logs/functest/lf-pod1/gambia/2018-10-23_10-34-07/tempest_full/tempest-report.html

    Change-Id: I3b6bb632412c0fecaa659da262760af64d79fa71
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 41a82f9..dddd807 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 41a82f98b3afa096a3a3399c780e975a79e2324a
+Subproject commit dddd8073c97ca09937504cb10c1a7be2a0986380