Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - docker: add kafka support to collectd

    Adds kafka support to collectd, cleaned up configuration files and updates
    documentation.

    Change-Id: Ie66ed22e8904e08e59aa7047d6afc9d176f3fb02
    Signed-off-by: Maryam Tahhan <maryam.tahhan@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 016ec07..bfb1d75 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 016ec072effd1638b52179eb056fda2891bd3777
+Subproject commit bfb1d7536e376244a48275afdbb5693c80571ed1