chenpiaoping

Results 3 issues of chenpiaoping

We need to consider how alcor perceives aca crash, and how dose aca get complete configuration after it restart.

documentation

![image](https://user-images.githubusercontent.com/60864880/91925401-7e6f5180-ed07-11ea-8ddb-a60038f37701.png) We can divide the messages sent by DPM to ACA into two categories: unicast messages (such as port configuration information) and broadcast messages (such as neighbor table information). Grouping...

documentation
P1

__Request__ 1. Add some fields(revisionNumber createAt updateAt) to CustomerResource. 2. These fields are used in all services. 3. Modify createAt when creating a resource. 4. Modify updateAt when updating resources.

enhancement
P2
contract