Merge remote-tracking branch 'origin/master'

fengxiang

2018-07-24 7a52cd14e12e5b1053a26ed5a4799da7a09d4b16

1
distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.5.2/apache-maven-3.5.2-bin.zip