Update git submodules

* Update docs/submodules/barometer from branch 'stable/euphrates'
  - Added index files for scenario docmentation

    Change-Id: Ic4fbf5a0437bc5ead84524212265f2a2255dfb13
    Signed-off-by: Sofia Wallin <sofia.wallin@ericsson.com>
    (cherry picked from commit aa0a56c3e0357df9196d4f128814201d20e344e6)

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 3416a21..f029879 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 3416a2156b2a0e02bacef36e9c1acf4461f64a52
+Subproject commit f029879bc7dfaebc5f74c29f54100c03049a56d3