Update git submodules

* Update docs/submodules/bottlenecks from branch 'master'
  - add openstack-exporter uninstallation

    Since openstack-exporter has been added, the uninstallation
    should also be supported

    Change-Id: I9f2bfc44d04ace53a722b42897053c1a54cc6258
    Signed-off-by: Yang (Gabriel) Yu <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index 09df92d..61467d8 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit 09df92d801b68dc42d7b9e39e3c718988b0c01c6
+Subproject commit 61467d8cb860cd3e3aebe64b5dc09813052ddc87