Update git submodules

* Update docs/submodules/bottlenecks from branch 'stable/fraser'
  - bug-fix: node-exporter on centos7 isolated with host net

    Node-exporter container need to be isolated with host net
    to make the port mapping work.

    Change-Id: Id04ad458ea56ef4080bba8346a7a1bf034956e0d
    Signed-off-by: Yang (Gabriel) Yu <Gabriel.yuyang@huawei.com>
    (cherry picked from commit 738adfa7ad0f7ef8d9d2d6c60153c0d97008caaf)

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index 14404f0..d5d78d4 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit 14404f05d92233ebb04a8d0d45f4f73f6a1be28e
+Subproject commit d5d78d499b8e0e4df8201370935996e04824a8f0