The patch includes these following update:
    1.Change from encryption_algorithm to enc_alg, and from authentication_algorithm to auth_alg, and from authentication_mode to auth_mod
    2. Check all codes of VPNaas code with PEP8 and modify the VPNaaS to meet the coding style which Quantum recommands
    3. Use PENDING_* status to achieve Object-level lock on the Server end.