[MDEP-301] Allow build-classpath to output to property
Submitted by Ryan Heinen.

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1442131 13f79535-47bb-0310-9956-ffa450edef68
add contributor

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1442132 13f79535-47bb-0310-9956-ffa450edef68
minor code format

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1442134 13f79535-47bb-0310-9956-ffa450edef68