[Java] Use a standard checkstyle config for build.

Author: mjpt777

build.gradle

@@ -131,7 +131,6 @@ subprojects {
  }
 
  checkstyle {
- configFile = new File(rootDir, 'config/checkstyle/checkstyle.xml')
  toolVersion = '8.12'
  }
 

config/checkstyle/checkstyle.xml

@@ -3,7 +3,7 @@
  "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
 <module name="Checker">
  <module name="SuppressionFilter">
- <property name="file" value="config/checkstyle/suppress.xml"/>
+ <property name="file" value="config/checkstyle/suppressions.xml"/>
  </module>
 
  <module name="SuppressWarningsFilter"/>