[DISCUSS]Simplify Dynamic Config (Apollo) Integration Test in Java Chassis

[??????]

Hi all??
   We had integration with Apollo for support dynamic config in Java Chassis, 
our CI will pull up apollo docker containers for test 
(nobodyiam/apollo-quick-start and lijasonvip/apollodb), this step is very slow 
and easy failed.
   I found that we are only use apollo openapi 
(https://github.com/ctripcorp/apollo/wiki/Apollo%E5%BC%80%E6%94%BE%E5%B9%B3%E5%8F%B0)
 to get configurations from it, code below :
  
 private static RestTemplate rest = new RestTemplate();
 ResponseEntity<String> exchange = rest.exchange(composeAPI(), HttpMethod.GET, 
entity, String.class);
  
  It is a general http GET request, so I think we only need start up a http 
server and direct return a default configuration content for this url in order 
to simulate the apollo server, that is enough.
  
   Any thoughts?
  
 Best Regards & Thanks!
 Yangyong Zheng