Update git submodules

* Update docs/submodules/bottlenecks from branch 'stable/danube'
  - Bug fix: fit Yardstick 3.1 version.

    JIRA: BOTTLENECK-173

    This patch will add a file to create some yardstick conf,
    Yardstick will use this file to manage output file type.

    Change-Id: I1d265af9f0b9b5132dc63c4d6d95d5bc194c7ff6
    Signed-off-by: liyin <liyin11@huawei.com>
    (cherry picked from commit 962b6269fdee0991251304a2b16cba78961d4b42)

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index d1fa84e..41f9a76 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit d1fa84ed4774525e634cc7f402be62bfccf7c876
+Subproject commit 41f9a76fbb5d5ae8aa97d02ec0965717dc8093b2