Update git submodules

* Update docs/submodules/bottlenecks from branch 'stable/euphrates'
  - bugfix: stress ping for offline support

    JIRA: BOTTLENECK-226

    See above

    Change-Id: Iba5d21348355a80d6c17deb1a12114d1d07e5c15
    Signed-off-by: Yang Yu <Gabriel.yuyang@huawei.com>
    (cherry picked from commit 9400c02df69737daf14644d1113ac9c1173fa70a)

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index c7e43d9..9efc276 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit c7e43d91f4a6babaff1f373b0a7ed102a876e7d3
+Subproject commit 9efc27665e10b4a36153291e171efdd8bf10c11b