Update git submodules

Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge changes from topic 'unittest2'

    * changes:
      Add more test function and case in test_utils.py
      Add more test cases in test_deploy.py

  - Add more test function and case in test_utils.py

    Add more test functions and test case in test_utils.py,
    test_daisy_server.py and test_environment.py.

    Change-Id: I7e4ea6993205e1d2f7cc8202820a3ada99613910
    Signed-off-by: zhongjun <zhong.jun@zte.com.cn>
  - Add more test cases in test_deploy.py

    Add more test cases in test_deploy.py and test_environment.py

    Change-Id: I6adf3f51aa7a436387c2da8a8dc8c67f6e5a70db
    Signed-off-by: zhongjun <zhong.jun@zte.com.cn>