Update git submodules

* Update docs/submodules/bottlenecks from branch 'master'
  - Update Dockerfile

    1. Openstack command lines keep poping up warnings which
    cause reading comand results wrongly.
    2. Update the ubuntu version and packages to remove redundance
    which is a historical debt.

    Change-Id: I3cdb7a9ec3f0bc41ecfe5b8bf9d44878485de40f
    Signed-off-by: Yang (Gabriel) Yu <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index f6ca90e..0ea5233 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit f6ca90e950a3b007b118cad702616267fab91916
+Subproject commit 0ea5233caabae215afb0769194a87f32a430fa2d