Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Merge "Fix for Grafana does not plot the RDT plugin data correctly."
  - Fix for Grafana does not plot the RDT plugin data correctly.

    Fixed the interval of intel_rdt plugin and Grafana dashboard settings
    to follow the correct interval.

    Change-Id: Ia792c6b6308526d82f153275d5d5393b0aea312d
    Signed-off-by: Kamil Wiatrowski <kamilx.wiatrowski@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index fe89db6..73abc06 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit fe89db62df67452730f3793538efcc7fd5c4b488
+Subproject commit 73abc060f31a6bf866fa1dad0a1a6efdfd94d775