Update git submodules

* Update docs/submodules/bottlenecks from branch 'master'
  - Merge "Barometer automated installation script for jump server and compute/controller nodes"
  - Barometer automated installation script for jump server
    and compute/controller nodes

    JIRA: BOTTLENECK-182

    Install barometer for collecting OVS and collectd statistics as
    docker containers on all nodes

    Change-Id: I8ae7e2bcbe95ab6e1224e08828c822d50367f616
    Signed-off-by: Rutuja Surve <rutuja.r.surve@gmail.com>

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index dff85c2..b73ce08 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit dff85c2483e71cd7a4fe1fe48e62b09923bb0ffd
+Subproject commit b73ce0809f17d08ab03f719dbb3a4637c49d4848