Re??[Improvement] Integrate checkstyle result into CI

[Yichao Yang]

+1




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??????:                                                                         
                                               "dev"                            
                                                        
<baicai.c...@gmail.com&gt;;
????????:&nbsp;2020??8??16??(??????) ????1:49
??????:&nbsp;"dev"<dev@dolphinscheduler.apache.org&gt;;

????:&nbsp;[Improvement] Integrate checkstyle result into CI



Hi, folks
Since we have made checkStyle specifications [1]. We integrated checkstyle
results into CI, which will make code review easier [2].

[1]
https://lists.apache.org/thread.html/ra65d23640728b12a8a1102495202ff066accfe99e80e5c694e093d49%40%3Cdev.dolphinscheduler.apache.org%3E

[2] https://github.com/apache/incubator-dolphinscheduler/pull/3518