renamed CheckstyleReportListener to CheckstyleCheckerListener to better match the use

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1608900 13f79535-47bb-0310-9956-ffa450edef68
[MRESOURCES-180]
 - Fixed problem with documentation.


git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1608910 13f79535-47bb-0310-9956-ffa450edef68