Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Switch to project domain name"
  - Switch to project domain name

    At least Fuel, Apex and Joid don't export OS_PROJECT_DOMAIN_ID.
    https://build.opnfv.org/ci/view/functest/job/functest-joid-baremetal-daily-master/353/console

    Change-Id: I8441d2de1841d5a9ce78c6929fd78da01c45548c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 062513f..ac8e3d4 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 062513f302369a8d48394edb0b1a75df660fee20
+Subproject commit ac8e3d4d9f7fe99021f41ee9c86370e7d9866d65