Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Merge "Switch to Xtesting"
  - Switch to Xtesting

    It inherits from xtesting.core.feature [1].

    [1] http://xtesting.readthedocs.io/en/latest/apidoc/xtesting.core.feature.html

    Change-Id: Ib547aa60d9b8bf61ab5433496d7149a43355d08c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 589167c..69b5da2 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 589167ce4710aad5cc1def2e84eb135b2619ce16
+Subproject commit 69b5da25c2d1ca62fe08fd4088366a5341372c7c