[MACR-18] Upgrade to maven-plugins version 25 to 26
 - Fixed checkstyle reported issues.


git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1638681 13f79535-47bb-0310-9956-ffa450edef68
[MACR-16] Upgrade maven-archiver to 2.6

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1638682 13f79535-47bb-0310-9956-ffa450edef68
[MACR-17] Upgrade plexus-archiver 2.7.1 to 2.8.2

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1638683 13f79535-47bb-0310-9956-ffa450edef68