use new quartz builder

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1546487 13f79535-47bb-0310-9956-ffa450edef68
remove unused imports

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1546488 13f79535-47bb-0310-9956-ffa450edef68