Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge changes from topic 'storage'

    * changes:
      Keep tests/data consistent with repository structure
      Add score calculation module for storperf

  - Keep tests/data consistent with repository structure

    - rename `benchmarks` in `tests/data` to `resources`
    - delete obsoleted contents

    JIRA: QTIP-258
    Change-Id: I7f4ec1a1fc7b355922c7aee76851e7f0dd026f72
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>
  - Add score calculation module for storperf

    Change-Id: I469ee4d768e16a27c3bde660bc1029d5a3507b72
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 028cef6..9ac9231 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 028cef6600399cae4ce6d252a03d6cfb691d43f0
+Subproject commit 9ac9231cf1876719ca15f681a8fae667343a8c77