Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Find nova vs. vm mapping relation"
  - Find nova vs. vm mapping relation

    Find nova vs. vm mapping relation, and save it to a
    json file named "nova_vm.json"

    JIRA: QTIP-253

    Change-Id: Ib9b6356525d78cd69752843ff65425a4628bd160
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 769f008..f708300 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 769f00864e96941ab0a8ac6ac33d4582e01cc869
+Subproject commit f708300052c2315994ba16793972ce0dfbfa237e