Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "add a handling process when testapi_url is None"
  - add a handling process when testapi_url is None

    Change-Id: Ic1a27a0b9328f0343d6df51d863bf1ad1eb15992
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 944cf2c..77828bd 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 944cf2c05128ef7631684d5c707104033a8e998a
+Subproject commit 77828bdd6821c8c8eb0ffe57cf423563e06853f7