Update git submodules

* Update docs/submodules/bottlenecks from branch 'stable/fraser'
  - Add/modify the Grafana Dashboard

    Adding/modify metrics and structure of dashboard
    for Long Duration Test

    Change-Id: I4d1f169b7aa1e0f906e09fae13010ad3b8b49038
    Signed-off-by: Yang Yu <Gabriel.yuyang@huawei.com>
    (cherry picked from commit 8d5e2fff2f9800942cf7f2c8a15b648ba3c76a16)

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index 3f36761..fd3a696 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit 3f3676124f276985a0eb8986f53683a39f353dc2
+Subproject commit fd3a69670eb2e56f314134002c393c8844b8695f