Update git submodules

* Update docs/submodules/qtip from branch 'stable/danube'
  - Merge "Add unit tests for List and get in API." into stable/danube
  - Add unit tests for List and get in API.

     - refactor controllers
     - remove abspath and other irrelvant data in response
     - move fixtures
     - refactor decorators

    JIRA: QTIP-226

    Change-Id: I5fac5b1bc998da198098992e7ddb47ba49685f31
    Signed-off-by: akhilbatra898 <akhil.batra@research.iiit.ac.in>
    (cherry picked from commit bef693f40ad87170b7233b9fef62f2fd8abfc8d8)

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 686c702..4fda4a5 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 686c7023613491a99c8e2ada758edb720655a6e6
+Subproject commit 4fda4a5819fda210ed824c504d4bed1751f8f51a