Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Updating the constrains for the Barometer test-suite"
  - Updating the constrains for the Barometer test-suite

    The patch switches the tests for Apex, which is the only Installer
    supported by the Barometer project for the OPNFV Euphrates Release.

    Change-Id: Ic064a41402bc4f27280f8d5e408d59ad41f888bc
    Signed-off-by: Calin Gherghe <calin.gherghe@intel.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 5612ba4..172b570 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 5612ba4811fcc27fb51c61dd18d595d3dfcd098d
+Subproject commit 172b5709ede1f32b042de621b932f6162f2d89b9