upgrade to last parent pom

git-svn-id: https://svn.apache.org/repos/asf/maven/plugin-tools/trunk@1438098 13f79535-47bb-0310-9956-ffa450edef68
[MPLUGIN-239] Execute goal does not passes from mojos.xml pluginMetadata
Submitted by Ben Tatham.

git-svn-id: https://svn.apache.org/repos/asf/maven/plugin-tools/trunk@1438099 13f79535-47bb-0310-9956-ffa450edef68