Update git submodules

* Update docs/submodules/bottlenecks from branch 'master'
  - bug-fix: python mimic source method

    JIRA: BOTTLENECK-222

    Details could be referred to the above JIRA ticket

    Change-Id: I07d89ee85e18a78d060959cfac5ded82aa83ef32
    Signed-off-by: Yang Yu <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index c02cab3..7407bfd 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit c02cab310f0c222a00596f170b22758b1423a6f7
+Subproject commit 7407bfdb64115ee380b205b88b689762b3340621