Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Integrate cli, runner and reporter."
  - Integrate cli, runner and reporter.

    - Execute runner via a shell command
    - Change format of qtip result directory to qtip-timestamp
    - Add path option in reporter to match with runner

    JIRA: QTIP-229

    Change-Id: I7d8562fd7100b1f40cdc8d53b0daa6a06a55b495
    Signed-off-by: Taseer Ahmed <taseer94@gmail.com>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index ff0316e..31fd7ff 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit ff0316e4a23ac9edcd64e3f312a344d3cc527e7f
+Subproject commit 31fd7fff783ce793d51a06780c1ab424aa1d8d33