Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Fix swift operator role

    [1] https://build.opnfv.org/ci/view/functest/job/functest-fuel-armband-baremetal-daily-master/35/console

    Change-Id: I7236bf5a74f36941f499da32c5c77dcd0b98b6f1
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index a624e4a..3d1986d 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit a624e4a9a03d03cbfecc4bdcd5fb91068205b36d
+Subproject commit 3d1986d1a8035e93b7ad7e4331cb1cbe126a857f