A simple integration tests of Seata support for OceanBase database

Services: euraka(registry), order, storage

Others: Seata server, DB server

Note: For convenience, instead of using Nacos or Dubbo as service registries and Seata TC as a database to store global and branch state, we use eureka and file

1. clone the branch for OceanBase supporting
2. config server in application.yml

seata:
  registry:
    type: eureka
    eureka:
      serviceUrl: http://localhost:8761/eureka/
      application: default
      weight: 1

3. install and run seata-server(io.seata.server.ServerApplication)

1. initialize seata client data by DDL Script
2. initialize business data by DDL Script

1. test mysql mode
2. test oracle mode