Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Fix links to remove references to submodules

    All references to submodules must be removed for docs to
    work going forward.

    Can be tested once your project has a local tox file

    Change-Id: Ia3e70902fb23c3612372b01aa2f51512057af951
    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index b52c942..e7f7e92 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit b52c942a4fbfc5023780d23954de953b817c6dc0
+Subproject commit e7f7e9226f2370afe0d57b4c43c5bfe4bf30a942