Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - docker: rename barometer image and update documentation

    Rename the barometer image from barometer to barometer-collectd to
    align with naming convention of other barometer images and move relevant
    files to new barometer-collectd directory.Docker userguide also updated accordingly

    Change-Id: Id866baf41bc38d3db8575ee00abfc64e97c7259b
    Signed-off-by: gordonkelly <gordon.kelly@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 06f5fee..6c50232 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 06f5fee2ba197995afd52f78640b0358070ec687
+Subproject commit 6c502325f052d1fcd4fc4ef791b8ab4262d23a04