Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "update Dockerfile"
  - update Dockerfile

    - remove dependencies which is not in use
    - remove unuse envrioment variables HOME and QTIP_DIR
    - set envrioment variable USER to root
    - pip install qtip with parameter -e
    - automatically startup ssh-agent

    Change-Id: I16999db53745b03c00260b2b5d73c5e89c0005f3
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index b2614e4..dae8de0 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit b2614e45ec4f7c7d21be7f9b15edafd4086d88de
+Subproject commit dae8de048d633997b5c96a773d29f52d65af462f