Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Ensure len(project_name) < 64

    https://build.opnfv.org/ci/view/functest/job/functest-apex-baremetal-daily-master/259/console
    https://build.opnfv.org/ci/view/functest/job/functest-fuel-baremetal-daily-master/428/console

    Change-Id: Ib64878962a71b6b45ef039fce8bfaa43172b2498
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index c3cb309..3eec655 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit c3cb30973bd96cc2e562f24277c7d19433900d89
+Subproject commit 3eec6556fa20e51d5e6596253393199469c83556