Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - generate inventory file and ssh configuration file

    Generate inventory file and ssh configuration file for VM.
    The default image is ubuntu 16.04. So the ansible user is
    ubuntu.

    Change-Id: Ie14ebcdcfbc24f045ffd32785eec07df5798c5fb
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 44b6f29..8126d82 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 44b6f29402625d1d29d482a5524efa27112886ce
+Subproject commit 8126d8250b7c7782d2a391d5bb450e784a31e857