Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Merge "docker: barometer-collectd openstack plugin deps"
  - docker: barometer-collectd openstack plugin deps

    Update the the barometer-collectd container to install the python dependencies
    for the openstack plugins.

    Change-Id: If8ba14066aff5f0257a400ece642a8d478600c77
    Signed-off-by: Maryam Tahhan <maryam.tahhan@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index fddabfa..04c4011 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit fddabfadabcdfc8a0fa428b5a7688a74877ee60b
+Subproject commit 04c4011bf6dab58da8365eca9388e6cacbdf8734