Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - docker: remove zookeeper from kafka docker

    Remove zookeeper from kafka docker and add ability to specify kafka
    broker id and address of zookeeper host.

    Change-Id: Ib6f46cf326999dcd1440dc06ab5cf6665ec578ad
    Signed-off-by: gordonkelly <gordon.kelly@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 3e94f95..d4479cd 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 3e94f95882d1b566a546059240631358e6460501
+Subproject commit d4479cd89385b9370b22f5157c654f0551d0dc26