Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - remove ansible.cfg.default which is no longer in use

    Change-Id: I3d2888962edc8506a702d53225b082680b0f9060
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 28769eb..d15914f 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 28769eb7866a0fd362dd68e9ea545a82f136c679
+Subproject commit d15914ff7f4be5ad7bd3812f9214d73d123996a5