move EasyCloud lib v2 test code to this branch from branch: WES_MICO_EasyCloud.

note:
  1. Move EasyCloud lib v2 test code into this branch from branch: WES_MICO_EasyCloud.
  2. this branch is used to test EasyCloud libs, and branch: WES_MICO_EasyCloud is just
     used to source code development.