Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Storage QPI Userguide"
  - Storage QPI Userguide

    Add storage QPI userguide.

    JIRA: QTIP-288

    Change-Id: Ie3376345832e54238239a44f0d4e1218dbac82c1
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 196517f..73c32af 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 196517f67aea7202b71682577456d59b73759df7
+Subproject commit 73c32afb3ee4a0f6fc0b5891965265992a46ca01