Update git submodules

* Update docs/submodules/bottlenecks from branch 'stable/fraser'
  - bug-fix: idenity env not defined

    OS_TENANT_NAME is wrongly used in getting openstack project
    information and is deprecated in keystone v3.
    Use OS_PROJECT_NAME to fix

    Change-Id: I941c612989ea5373ccf8a9d2e88ebd3eabcece73
    Signed-off-by: Yang (Gabriel) Yu <Gabriel.yuyang@huawei.com>
    (cherry picked from commit 265d35dd56247e855002c05cc4f11b39514700c5)

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index 26c5395..316f537 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit 26c5395c463a51413fd06664ebd630a09e00f88d
+Subproject commit 316f53716106bbcff780761ee1d24a610cc0e925