Update git submodules

Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge "Implement the deployment script with python"
  - Implement the deployment script with python

    1. deploy.py: control the work flow of the deployment
    2. daisy_server.py: maintain the ssh connection with daisy server
         and execute ssh commands
    3. environment.py: create/find/delete the nodes/vms, install operating system
         and openstack on nodes
    4. libvirt_utils.py: deal with the vm templates and call virsh commands
    5. utils.py: some common functions such as file/directory/bash operation

    Change-Id: I1caa4b0b3118665e15410e8f02bcb6473e5a530b
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>