Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Add ansible module `fuel`"
  - Add ansible module `fuel`

    This module will be used to generate a dynamic inventory of fuel nodes
    for performance testing

    Change-Id: Idaa491c5fc3050abfb8ba36328f2113cf2885179
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 135e068..02e2c33 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 135e068512d41da5e65737e4acae763d511d71ac
+Subproject commit 02e2c3372a654ffeb6cb34c6a0076da51cb568ea