move all update service module to 'updateservic

[liangchenye]

rebase code, create a new 'update service' directory which includes:

• key manager

  manager the priv/pub key

• storage

  store image/vm/app

• updateservice_interface

  simple interface for user to use update service

• client

  used for dockyard client

pass all the unit tests and integrate tests

Signed-off-by: liang chenye liangchenye@huawei.com

[liangchenye]

@genedna 在“另外版本”开发的时候整理了下结构，比tuf版本要稍微好点。另外也为了保证最后能够合并代码。此次进行了代码的 rebase.