Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - docs: update userguide for DPDK plugins

    Change-Id: I275d1760b59a994c3c8cfd04bbb3c4d8adb67301
    Signed-off-by: Przemyslaw Szczerbik <przemyslawx.szczerbik@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index b7fc179..8c33658 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit b7fc179bea3bbb5abafaef11e8bc30170a3a3107
+Subproject commit 8c336582c65fa0b5b7d62db935db7760552288d7