Update git submodules

* Update docs/submodules/qtip from branch 'stable/fraser'
  - bugfix: pip 10 can't work

    Docker image build failed on upgrading pip to 10.0.0 .
    Solution: https://github.com/pypa/pip/issues/5240#issuecomment-383115342

    Change-Id: I330dedf9dbc32d8bdac5b8cb87b5123187007e2e
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>
    (cherry picked from commit d415712aeaf87dd6d7383a7649e15a9350aba07b)

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 5f3d03f..2097792 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 5f3d03f429bd4f77687fb2b19d487a7fae281553
+Subproject commit 2097792fbfdca40c0a34c277dfac523911d58909