Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Print env vars and env_file

    It simply eases detecting wrong inputs [1].

    [1] https://build.opnfv.org/ci/view/functest/job/functest-apex-baremetal-daily-master/796/console

    Change-Id: I0784c29265c69a6ba4a049226196bcdd70b0a572
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index a1b0f64..67e9875 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit a1b0f64bccea682e55ec5086aef979df57cf686f
+Subproject commit 67e9875d82d1ee2de3ed64d756092b1f5698c9c0