Update git submodules

* Update docs/submodules/qtip from branch 'stable/danube'
  - 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>
    (cherry picked from commit c2bb13c460566a18e61a3c840bf12f7f717940c2)

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index f01644b..6a4c4e2 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit f01644b80a940cf17300114db7593c66c6120b54
+Subproject commit 6a4c4e2dba5c565871aa7259978a6ad547c34be2