[MSOURCES-83] Make Plugin only Maven 3.0 minimum - Lifted Java limit to 1.6 in accordance with 3.0.0 - Replaced maven-project dependency with dependency to maven-core. - Upgraded maven-plugin-testing-harness to 2.1 which needs maven-compat to work which is only in scope test.
maven/plugins/trunk/maven-source-plugin/pom.xml