[maven-release-plugin] copy for tag doxia-sitetools-1.7.5

git-svn-id: https://svn.apache.org/repos/asf/maven/doxia/doxia-sitetools/tags/doxia-sitetools-1.7.5@1809771 13f79535-47bb-0310-9956-ffa450edef68