Update git submodules

* Update docs/submodules/qtip from branch 'stable/fraser'
  - Update Pipfile.lock

    Python packages don't match their hashes from Pipfile.lock.
    Update Pipfile.lock

    Change-Id: Iea59c9b2d0e6b649724377378f5ee71c4a2280b0
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>
    (cherry picked from commit 2f9ea59dee331cbf61b1cf1bf6e00cbe3ab672d4)

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index c543277..6b22836 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit c543277815ab0fc01410a55e756e3e739d0f8e9a
+Subproject commit 6b2283677453e83d0a215301ae2adfa424254901