Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Adding support for prometheus using ansible

    To enable add the following with your ip address
    to your inventory file:

    [prometheus_hosts]
    172.24.4.19

    Change-Id: I85add815367bcbcf1240398db2c43c2130537969
    Signed-off-by: John O Loughlin <john.oloughlin@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 328129a..ada3bb5 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 328129a1fd4ae54fe012379439464a56d15d4681
+Subproject commit ada3bb5cda036c736b460b76552ce47dd8f40aa8