Update git submodules

* Update docs/submodules/bottlenecks from branch 'stable/danube'
  - Add frame support of elk one docker support

    JIRA: BOTTLENECK-171

    Add support of Bottlenecks docker frame refact,
    After this patch we will provide the ability of several installer.
    Add Yardstick_TAG to adjust yardstick docker version

    Change-Id: Ib431f8acf4a76b59f9d5e8783bcc7d2e5be208ae
    Signed-off-by: liyin <liyin11@huawei.com>
    (cherry picked from commit bde702f95563cf953c32f9bfd0587083a3fea26d)

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index 45d371c..1fd4046 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit 45d371c2a2d89231db9ffa892ce19da8f8b3cfa4
+Subproject commit 1fd4046eacef68412f65ac888646c14999fa8236