Update git submodules

* Update docs/submodules/bottlenecks from branch 'stable/fraser'
  - Merge "Prometheus Prototype Dashboard" into stable/fraser
  - Prometheus Prototype Dashboard

    JIRA: BOTTLENECK-181

    Prototype Grafana dashboard using Prometheus query language for
    displaying system and docker performance metrics

    Change-Id: I2659eb4a4d072e95f3fc5a5dac0b1e5b1c6e536e
    Signed-off-by: Rutuja Surve <rutuja.r.surve@gmail.com>
    (cherry picked from commit b06b5119a0632b1e830c4873ca4cec8f22925e32)

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index b28cca1..bb0af04 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit b28cca1064329fc82e79810fd37f3075a786a75d
+Subproject commit bb0af04f78e264c2500a574e2c48f249a2fa5bd2