Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Update entry_point to conform with Xtesting

    Functest is being updated to Xtesting 0.60 which leverages on
    stevedore [1].

    [1] https://docs.openstack.org/stevedore/latest/

    Change-Id: I02fae113dd0a8fbf5de4e6821c6d4476553fe633
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 1db7418..fe89db6 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 1db7418e39d41cb92e3b1af71d2cb4b9fabb29f2
+Subproject commit fe89db62df67452730f3793538efcc7fd5c4b488