Update git submodules

* Update docs/submodules/bottlenecks from branch 'stable/danube'
  - Merge "Bugfix: json format transform for report" into stable/danube
  - Bugfix: json format transform for report

    JIRA: BOTTLENECK-158

    The details part of report is not json formatted.
    This patch is to fix it.

    Change-Id: I089dae0c12e14935e4b7a5e7bdbe69f00e003f98
    Signed-off-by: yuyang <Gabriel.yuyang@huawei.com>
    (cherry picked from commit e4a17446f0f02d6ea950278074d88db6c09c5bb6)

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index 6d4c361..012e746 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit 6d4c361c67aa5166403cfa54378c3c29c1008975
+Subproject commit 012e74627d6a77ba751cc80543db7c27e224f922