no need to create etc.. if the index already exists

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1443258 13f79535-47bb-0310-9956-ffa450edef68
fix issue when creating repository with relative path index used a wrong repository directory

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1443259 13f79535-47bb-0310-9956-ffa450edef68