Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Adding different method to access compute and controllers

    This patch is similar to previous patch in adding a different
    method to log into the controller and compute nodes.

    Change-Id: I75332fbb794605477a7c751b59016ffb1a8cf3f2
    Signed-off-by: Sharada Shiddibhavi <sharada.shiddibhavi@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 4075101..88e6cca 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 40751018a8118e7c28ed93b98d04e41c78240bea
+Subproject commit 88e6ccad72bed9fb228540cd8050f9596d6eb1cd