Update git submodules

* Update docs/submodules/qtip from branch 'stable/danube'
  - Merge "Align folder structure `docs/testing/developer` to opnfvdocs template" into stable/danube
  - Align folder structure `docs/testing/developer` to opnfvdocs template

    Change-Id: I9ce069cf4b5384b5788ca7cfc70e4188519667d5
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>
    (cherry picked from commit 9639c68d1ed674f74ff1b187346241f5d7c82910)

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 784ef9f..bd46004 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 784ef9f52c634aaa4e8727bb4a80cef1793d3391
+Subproject commit bd46004eab861c632439d5479a1aaeb305a68ae0