Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Merge "docker: influxdb add collectd database"
  - docker: influxdb add collectd database

    Change-Id: Ie417439b4fd6f0793925a20d95824c82af4eca7a
    Signed-off-by: Maryam Tahhan <maryam.tahhan@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 6c50232..e15d33e 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 6c502325f052d1fcd4fc4ef791b8ab4262d23a04
+Subproject commit e15d33ea0d91a977980efd1e26ff1907ddfcedf0