Review incubator-shenyu-client-golang #31 PR

[Lisandro]

Dear community:

 The  incubator-shenyu-client-golang has new  pr, please review the code.Here 
is this pr main function: Add consul_client test

Fix go lint

Here is link ：
https://github.com/apache/incubator-shenyu-client-golang/pull/31/files