[MACR-13]
 - Upgrade plexus-archiver from 2.6.3 to 2.7.1.


git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1632848 13f79535-47bb-0310-9956-ffa450edef68
[MACR-14]
 - Upgrade plexus-interpolation from 1.19 to 1.21


git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1632850 13f79535-47bb-0310-9956-ffa450edef68